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NDQ_009626 | The geologic time scale is based on major changes in | a. geology, b. climate, c. organisms, d. all of the above | d | Lesson: history of life on earth
Geologic Time:
Its hard to grasp the vast amounts of time since Earth formed and life first appeared. It may help to think of Earths history as a 24-hour day.
Earth in a Day:
Figure 7.17 shows the history of Earth in a day. In this model, the planet forms at midnight. The first proka... |
NDQ_009627 | If Earths history is represented by a 24-hour day, then life first appears at about | a. 3:00 am, b. 8:00 am, c. 1:00 pm, d. 3:00 pm | a | Lesson: history of life on earth
Geologic Time:
Its hard to grasp the vast amounts of time since Earth formed and life first appeared. It may help to think of Earths history as a 24-hour day.
Earth in a Day:
Figure 7.17 shows the history of Earth in a day. In this model, the planet forms at midnight. The first proka... |
NDQ_009628 | Which of the following divisions of the geologic time scale is longest? | a. epoch, b. era, c. period, d. eon | d | Lesson: history of life on earth
Geologic Time:
Its hard to grasp the vast amounts of time since Earth formed and life first appeared. It may help to think of Earths history as a 24-hour day.
Earth in a Day:
Figure 7.17 shows the history of Earth in a day. In this model, the planet forms at midnight. The first proka... |
NDQ_009629 | Which feature of modern Earth was absent when the planet first formed? | a. solid crust, b. oceans, c. atmosphere, d. all of the above | d | Lesson: history of life on earth
Geologic Time:
Its hard to grasp the vast amounts of time since Earth formed and life first appeared. It may help to think of Earths history as a 24-hour day.
Earth in a Day:
Figure 7.17 shows the history of Earth in a day. In this model, the planet forms at midnight. The first proka... |
NDQ_009630 | The earliest living things were | a. autotrophs, b. heterotrophs, c. eukaryotes, d. two of the above | b | Lesson: history of life on earth
Geologic Time:
Its hard to grasp the vast amounts of time since Earth formed and life first appeared. It may help to think of Earths history as a 24-hour day.
Earth in a Day:
Figure 7.17 shows the history of Earth in a day. In this model, the planet forms at midnight. The first proka... |
NDQ_009631 | The earliest cells | a. had a nucleus, b. made their own food, c. got energy from organic molecules, d. two of the above | c | Lesson: history of life on earth
Geologic Time:
Its hard to grasp the vast amounts of time since Earth formed and life first appeared. It may help to think of Earths history as a 24-hour day.
Earth in a Day:
Figure 7.17 shows the history of Earth in a day. In this model, the planet forms at midnight. The first proka... |
NDQ_009632 | The first multicellular organisms evolved about | a. 4.0 billion years ago, b. 3.6 billion years ago, c. 3.0 billion years ago, d. none of the above | d | Lesson: history of life on earth
Geologic Time:
Its hard to grasp the vast amounts of time since Earth formed and life first appeared. It may help to think of Earths history as a 24-hour day.
Earth in a Day:
Figure 7.17 shows the history of Earth in a day. In this model, the planet forms at midnight. The first proka... |
NDQ_009633 | Organisms that evolved at the beginning of the Paleozoic Era included | a. trilobites, b. sponges, c. reptiles, d. two of the above | d | Lesson: history of life on earth
Geologic Time:
Its hard to grasp the vast amounts of time since Earth formed and life first appeared. It may help to think of Earths history as a 24-hour day.
Earth in a Day:
Figure 7.17 shows the history of Earth in a day. In this model, the planet forms at midnight. The first proka... |
NDQ_009635 | The first mass extinction on Earth occurred at the end of the | a. Precambrian Supereon, b. Permian Period, c. Mesozoic Era, d. Cretaceous Period | a | Lesson: history of life on earth
Geologic Time:
Its hard to grasp the vast amounts of time since Earth formed and life first appeared. It may help to think of Earths history as a 24-hour day.
Earth in a Day:
Figure 7.17 shows the history of Earth in a day. In this model, the planet forms at midnight. The first proka... |
NDQ_009637 | Primates and human ancestors first appeared during the | a. Jurassic Period, b. Tertiary Period, c. Devonian Period, d. Quaternary Period | b | Lesson: history of life on earth
Geologic Time:
Its hard to grasp the vast amounts of time since Earth formed and life first appeared. It may help to think of Earths history as a 24-hour day.
Earth in a Day:
Figure 7.17 shows the history of Earth in a day. In this model, the planet forms at midnight. The first proka... |
NDQ_009638 | ___major division of Earths history that is known as the age of dinosaurs | a. Paleozoic Era, b. Precambrian Supereon, c. Cenozoic Era, d. LUCA, e. Mesozoic Era, f. mass extinction, g. geologic time scale | e | Lesson: history of life on earth
Geologic Time:
Its hard to grasp the vast amounts of time since Earth formed and life first appeared. It may help to think of Earths history as a 24-hour day.
Earth in a Day:
Figure 7.17 shows the history of Earth in a day. In this model, the planet forms at midnight. The first proka... |
NDQ_009641 | ___first major division of Earths history | a. Paleozoic Era, b. Precambrian Supereon, c. Cenozoic Era, d. LUCA, e. Mesozoic Era, f. mass extinction, g. geologic time scale | b | Lesson: history of life on earth
Geologic Time:
Its hard to grasp the vast amounts of time since Earth formed and life first appeared. It may help to think of Earths history as a 24-hour day.
Earth in a Day:
Figure 7.17 shows the history of Earth in a day. In this model, the planet forms at midnight. The first proka... |
NDQ_009643 | ___major division of Earths history that is called the age of mammals | a. Paleozoic Era, b. Precambrian Supereon, c. Cenozoic Era, d. LUCA, e. Mesozoic Era, f. mass extinction, g. geologic time scale | c | Lesson: history of life on earth
Geologic Time:
Its hard to grasp the vast amounts of time since Earth formed and life first appeared. It may help to think of Earths history as a 24-hour day.
Earth in a Day:
Figure 7.17 shows the history of Earth in a day. In this model, the planet forms at midnight. The first proka... |
NDQ_009644 | ___event in which the majority of Earths species die out | a. Paleozoic Era, b. Precambrian Supereon, c. Cenozoic Era, d. LUCA, e. Mesozoic Era, f. mass extinction, g. geologic time scale | f | Lesson: history of life on earth
Geologic Time:
Its hard to grasp the vast amounts of time since Earth formed and life first appeared. It may help to think of Earths history as a 24-hour day.
Earth in a Day:
Figure 7.17 shows the history of Earth in a day. In this model, the planet forms at midnight. The first proka... |
NDQ_009645 | The Jurassic Period is called the golden age of dinosaurs. | a. true, b. false | a | Lesson: history of life on earth
Geologic Time:
Its hard to grasp the vast amounts of time since Earth formed and life first appeared. It may help to think of Earths history as a 24-hour day.
Earth in a Day:
Figure 7.17 shows the history of Earth in a day. In this model, the planet forms at midnight. The first proka... |
NDQ_009646 | Mammals became the dominant land animals during the Mesozoic Era. | a. true, b. false | b | Lesson: history of life on earth
Geologic Time:
Its hard to grasp the vast amounts of time since Earth formed and life first appeared. It may help to think of Earths history as a 24-hour day.
Earth in a Day:
Figure 7.17 shows the history of Earth in a day. In this model, the planet forms at midnight. The first proka... |
NDQ_009647 | ___division of Earths history into eons, eras, and periods | a. Paleozoic Era, b. Precambrian Supereon, c. Cenozoic Era, d. LUCA, e. Mesozoic Era, f. mass extinction, g. geologic time scale | g | Lesson: history of life on earth
Geologic Time:
Its hard to grasp the vast amounts of time since Earth formed and life first appeared. It may help to think of Earths history as a 24-hour day.
Earth in a Day:
Figure 7.17 shows the history of Earth in a day. In this model, the planet forms at midnight. The first proka... |
NDQ_009648 | The last ice age ended about 12 million years ago. | a. true, b. false | b | Lesson: history of life on earth
Geologic Time:
Its hard to grasp the vast amounts of time since Earth formed and life first appeared. It may help to think of Earths history as a 24-hour day.
Earth in a Day:
Figure 7.17 shows the history of Earth in a day. In this model, the planet forms at midnight. The first proka... |
NDQ_009649 | ___major division of Earths history that began with the Cambrian explosion | a. Paleozoic Era, b. Precambrian Supereon, c. Cenozoic Era, d. LUCA, e. Mesozoic Era, f. mass extinction, g. geologic time scale | a | Lesson: history of life on earth
Geologic Time:
Its hard to grasp the vast amounts of time since Earth formed and life first appeared. It may help to think of Earths history as a 24-hour day.
Earth in a Day:
Figure 7.17 shows the history of Earth in a day. In this model, the planet forms at midnight. The first proka... |
NDQ_009650 | ___single cell believed to have given rise to all of the following life on Earth | a. Paleozoic Era, b. Precambrian Supereon, c. Cenozoic Era, d. LUCA, e. Mesozoic Era, f. mass extinction, g. geologic time scale | d | Lesson: history of life on earth
Geologic Time:
Its hard to grasp the vast amounts of time since Earth formed and life first appeared. It may help to think of Earths history as a 24-hour day.
Earth in a Day:
Figure 7.17 shows the history of Earth in a day. In this model, the planet forms at midnight. The first proka... |
NDQ_009651 | The current geological era is the Cenozoic Era. | a. true, b. false | a | Lesson: history of life on earth
Geologic Time:
Its hard to grasp the vast amounts of time since Earth formed and life first appeared. It may help to think of Earths history as a 24-hour day.
Earth in a Day:
Figure 7.17 shows the history of Earth in a day. In this model, the planet forms at midnight. The first proka... |
NDQ_009652 | When Earth first formed, it had oceans but no atmosphere. | a. true, b. false | b | Lesson: history of life on earth
Geologic Time:
Its hard to grasp the vast amounts of time since Earth formed and life first appeared. It may help to think of Earths history as a 24-hour day.
Earth in a Day:
Figure 7.17 shows the history of Earth in a day. In this model, the planet forms at midnight. The first proka... |
NDQ_009653 | _During Earths history, continents drifted and collided. | a. true, b. false | a | Lesson: history of life on earth
Geologic Time:
Its hard to grasp the vast amounts of time since Earth formed and life first appeared. It may help to think of Earths history as a 24-hour day.
Earth in a Day:
Figure 7.17 shows the history of Earth in a day. In this model, the planet forms at midnight. The first proka... |
NDQ_009654 | _If Earths history is represented by a 24-hour day, humans appear at about 8:00 pm. | a. true, b. false | b | Lesson: history of life on earth
Geologic Time:
Its hard to grasp the vast amounts of time since Earth formed and life first appeared. It may help to think of Earths history as a 24-hour day.
Earth in a Day:
Figure 7.17 shows the history of Earth in a day. In this model, the planet forms at midnight. The first proka... |
NDQ_009655 | _Earths earliest atmosphere contained more oxygen than the atmosphere does today. | a. true, b. false | b | Lesson: history of life on earth
Geologic Time:
Its hard to grasp the vast amounts of time since Earth formed and life first appeared. It may help to think of Earths history as a 24-hour day.
Earth in a Day:
Figure 7.17 shows the history of Earth in a day. In this model, the planet forms at midnight. The first proka... |
NDQ_009656 | _A total of four mass extinctions have occurred on Earth since life began. | a. true, b. false | b | Lesson: history of life on earth
Geologic Time:
Its hard to grasp the vast amounts of time since Earth formed and life first appeared. It may help to think of Earths history as a 24-hour day.
Earth in a Day:
Figure 7.17 shows the history of Earth in a day. In this model, the planet forms at midnight. The first proka... |
NDQ_009657 | _Fish first evolved during the Paleozoic Era. | a. true, b. false | a | Lesson: history of life on earth
Geologic Time:
Its hard to grasp the vast amounts of time since Earth formed and life first appeared. It may help to think of Earths history as a 24-hour day.
Earth in a Day:
Figure 7.17 shows the history of Earth in a day. In this model, the planet forms at midnight. The first proka... |
NDQ_009658 | _The Jurassic Period is known as the golden age of mammals. | a. true, b. false | b | Lesson: history of life on earth
Geologic Time:
Its hard to grasp the vast amounts of time since Earth formed and life first appeared. It may help to think of Earths history as a 24-hour day.
Earth in a Day:
Figure 7.17 shows the history of Earth in a day. In this model, the planet forms at midnight. The first proka... |
NDQ_009659 | _The extinction of the dinosaurs paved the way for reptiles to take over. | a. true, b. false | b | Lesson: history of life on earth
Geologic Time:
Its hard to grasp the vast amounts of time since Earth formed and life first appeared. It may help to think of Earths history as a 24-hour day.
Earth in a Day:
Figure 7.17 shows the history of Earth in a day. In this model, the planet forms at midnight. The first proka... |
NDQ_009708 | Which statement about the diversity of bacteria is false? | a. Bacteria are the most diverse organisms on Earth, b. Thousands of species of bacteria have been discovered, c. Few if any bacterial species remain to be discovered, d. Bacteria increase diversity by genetic transfer | c | Lesson: bacteria
Counting Bacteria:
Bacteria are the most abundant living things on Earth. They live in almost all environments. They are found in the air, ocean, soil, and intestines of animals. They are even found in rocks deep below Earths surface. Any surface that has not been sterilized is likely to be covered wi... |
NDQ_009709 | Salmonella bacteria are | a. prokaryotes, b. bacillus bacteria, c. a common cause of food poisoning, d. all of the above | d | Lesson: bacteria
Counting Bacteria:
Bacteria are the most abundant living things on Earth. They live in almost all environments. They are found in the air, ocean, soil, and intestines of animals. They are even found in rocks deep below Earths surface. Any surface that has not been sterilized is likely to be covered wi... |
NDQ_009710 | Bacteria | a. are the most abundant organisms on Earth, b. have fewer species than any other domain, c. can be observed only with an electron microscope, d. all of the above | a | Lesson: bacteria
Counting Bacteria:
Bacteria are the most abundant living things on Earth. They live in almost all environments. They are found in the air, ocean, soil, and intestines of animals. They are even found in rocks deep below Earths surface. Any surface that has not been sterilized is likely to be covered wi... |
NDQ_009711 | Bacteria that are classified as gram-negative | a. stain purple with gram stain, b. have an outer membrane, c. lack a cell wall, d. two of the above | b | Lesson: bacteria
Counting Bacteria:
Bacteria are the most abundant living things on Earth. They live in almost all environments. They are found in the air, ocean, soil, and intestines of animals. They are even found in rocks deep below Earths surface. Any surface that has not been sterilized is likely to be covered wi... |
NDQ_009712 | Bacteria can help people by | a. making fuels, b. cleaning up oil spills, c. making vaccines, d. all of the above | d | Lesson: bacteria
Counting Bacteria:
Bacteria are the most abundant living things on Earth. They live in almost all environments. They are found in the air, ocean, soil, and intestines of animals. They are even found in rocks deep below Earths surface. Any surface that has not been sterilized is likely to be covered wi... |
NDQ_009713 | Gram-positive bacteria have a(n) | a. thick cell wall, b. outer membrane, c. cell nucleus, d. two of the above | a | Lesson: bacteria
Counting Bacteria:
Bacteria are the most abundant living things on Earth. They live in almost all environments. They are found in the air, ocean, soil, and intestines of animals. They are even found in rocks deep below Earths surface. Any surface that has not been sterilized is likely to be covered wi... |
NDQ_009714 | Lyme disease is caused by bacteria that are spread by | a. mosquitoes, b. black flies, c. deer ticks, d. bed bugs | c | Lesson: bacteria
Counting Bacteria:
Bacteria are the most abundant living things on Earth. They live in almost all environments. They are found in the air, ocean, soil, and intestines of animals. They are even found in rocks deep below Earths surface. Any surface that has not been sterilized is likely to be covered wi... |
NDQ_009715 | All bacteria | a. die at temperatures higher than 37 C, b. can be killed with chlorine bleach, c. are resistant to antibiotics, d. are poisoned by oxygen | b | Lesson: bacteria
Counting Bacteria:
Bacteria are the most abundant living things on Earth. They live in almost all environments. They are found in the air, ocean, soil, and intestines of animals. They are even found in rocks deep below Earths surface. Any surface that has not been sterilized is likely to be covered wi... |
NDQ_009716 | Bacteria live in Earths | a. crust, b. ocean, c. atmosphere, d. all of the above | d | Lesson: bacteria
Counting Bacteria:
Bacteria are the most abundant living things on Earth. They live in almost all environments. They are found in the air, ocean, soil, and intestines of animals. They are even found in rocks deep below Earths surface. Any surface that has not been sterilized is likely to be covered wi... |
NDQ_009717 | How many bacterial cells normally live in and on the human body? | a. a few hundred, b. about a thousand, c. several million, d. trillions | d | Lesson: bacteria
Counting Bacteria:
Bacteria are the most abundant living things on Earth. They live in almost all environments. They are found in the air, ocean, soil, and intestines of animals. They are even found in rocks deep below Earths surface. Any surface that has not been sterilized is likely to be covered wi... |
NDQ_009719 | The development of antibiotic resistance is an example of | a. gene therapy, b. biotechnology, c. gene cloning, d. natural selection | d | Lesson: bacteria
Counting Bacteria:
Bacteria are the most abundant living things on Earth. They live in almost all environments. They are found in the air, ocean, soil, and intestines of animals. They are even found in rocks deep below Earths surface. Any surface that has not been sterilized is likely to be covered wi... |
NDQ_009721 | The best way to kill bacteria in drinking water is to | a. raise its temperature to the boiling point (100 C), b. add a large amount of chlorine bleach to it, c. dissolve antibiotic drugs in it, d. pass it through a sieve | a | Lesson: bacteria
Counting Bacteria:
Bacteria are the most abundant living things on Earth. They live in almost all environments. They are found in the air, ocean, soil, and intestines of animals. They are even found in rocks deep below Earths surface. Any surface that has not been sterilized is likely to be covered wi... |
NDQ_009729 | A spiral-shaped bacterium is classified as a spirillus. | a. true, b. false | a | Lesson: bacteria
Counting Bacteria:
Bacteria are the most abundant living things on Earth. They live in almost all environments. They are found in the air, ocean, soil, and intestines of animals. They are even found in rocks deep below Earths surface. Any surface that has not been sterilized is likely to be covered wi... |
NDQ_009730 | Bacteria that form biofilms are multicellular prokaryotes. | a. true, b. false | b | Lesson: bacteria
Counting Bacteria:
Bacteria are the most abundant living things on Earth. They live in almost all environments. They are found in the air, ocean, soil, and intestines of animals. They are even found in rocks deep below Earths surface. Any surface that has not been sterilized is likely to be covered wi... |
NDQ_009732 | Bacteria cover Earths surface but are not found far below it. | a. true, b. false | b | Lesson: bacteria
Counting Bacteria:
Bacteria are the most abundant living things on Earth. They live in almost all environments. They are found in the air, ocean, soil, and intestines of animals. They are even found in rocks deep below Earths surface. Any surface that has not been sterilized is likely to be covered wi... |
NDQ_009735 | There are more bacteria than any other organisms on Earth. | a. true, b. false | a | Lesson: bacteria
Counting Bacteria:
Bacteria are the most abundant living things on Earth. They live in almost all environments. They are found in the air, ocean, soil, and intestines of animals. They are even found in rocks deep below Earths surface. Any surface that has not been sterilized is likely to be covered wi... |
NDQ_009736 | Yogurt is made with the help of bacteria. | a. true, b. false | a | Lesson: bacteria
Counting Bacteria:
Bacteria are the most abundant living things on Earth. They live in almost all environments. They are found in the air, ocean, soil, and intestines of animals. They are even found in rocks deep below Earths surface. Any surface that has not been sterilized is likely to be covered wi... |
NDQ_009737 | __A book lying on your desk is likely to be covered with bacteria. | a. true, b. false | a | Lesson: bacteria
Counting Bacteria:
Bacteria are the most abundant living things on Earth. They live in almost all environments. They are found in the air, ocean, soil, and intestines of animals. They are even found in rocks deep below Earths surface. Any surface that has not been sterilized is likely to be covered wi... |
NDQ_009738 | __Bacteria are the most diverse organisms on Earth. | a. true, b. false | a | Lesson: bacteria
Counting Bacteria:
Bacteria are the most abundant living things on Earth. They live in almost all environments. They are found in the air, ocean, soil, and intestines of animals. They are even found in rocks deep below Earths surface. Any surface that has not been sterilized is likely to be covered wi... |
NDQ_009739 | __Bacteria stain differently with gram stain depending on whether they have a cell nucleus. | a. true, b. false | b | Lesson: bacteria
Counting Bacteria:
Bacteria are the most abundant living things on Earth. They live in almost all environments. They are found in the air, ocean, soil, and intestines of animals. They are even found in rocks deep below Earths surface. Any surface that has not been sterilized is likely to be covered wi... |
NDQ_009740 | __All bacteria cause human illnesses. | a. true, b. false | b | Lesson: bacteria
Counting Bacteria:
Bacteria are the most abundant living things on Earth. They live in almost all environments. They are found in the air, ocean, soil, and intestines of animals. They are even found in rocks deep below Earths surface. Any surface that has not been sterilized is likely to be covered wi... |
NDQ_009741 | __Some bacteria can be used as pesticides. | a. true, b. false | a | Lesson: bacteria
Counting Bacteria:
Bacteria are the most abundant living things on Earth. They live in almost all environments. They are found in the air, ocean, soil, and intestines of animals. They are even found in rocks deep below Earths surface. Any surface that has not been sterilized is likely to be covered wi... |
NDQ_009742 | __Pickles and cheese on a cheeseburger are both made with the help of bacteria. | a. true, b. false | a | Lesson: bacteria
Counting Bacteria:
Bacteria are the most abundant living things on Earth. They live in almost all environments. They are found in the air, ocean, soil, and intestines of animals. They are even found in rocks deep below Earths surface. Any surface that has not been sterilized is likely to be covered wi... |
NDQ_009743 | __Strep throat is a bacterial infection. | a. true, b. false | a | Lesson: bacteria
Counting Bacteria:
Bacteria are the most abundant living things on Earth. They live in almost all environments. They are found in the air, ocean, soil, and intestines of animals. They are even found in rocks deep below Earths surface. Any surface that has not been sterilized is likely to be covered wi... |
NDQ_009744 | ____sphere-shaped bacterium | a. gram, b. spirillus, c. vector, d. bacillus, e. pathogen, f. coccus, g. antibiotic | f | Lesson: bacteria
Counting Bacteria:
Bacteria are the most abundant living things on Earth. They live in almost all environments. They are found in the air, ocean, soil, and intestines of animals. They are even found in rocks deep below Earths surface. Any surface that has not been sterilized is likely to be covered wi... |
NDQ_009745 | ____organism that spreads pathogens from host to host | a. gram, b. spirillus, c. vector, d. bacillus, e. pathogen, f. coccus, g. antibiotic | c | Lesson: bacteria
Counting Bacteria:
Bacteria are the most abundant living things on Earth. They live in almost all environments. They are found in the air, ocean, soil, and intestines of animals. They are even found in rocks deep below Earths surface. Any surface that has not been sterilized is likely to be covered wi... |
NDQ_009746 | ____name of the dye used to color bacteria | a. gram, b. spirillus, c. vector, d. bacillus, e. pathogen, f. coccus, g. antibiotic | a | Lesson: bacteria
Counting Bacteria:
Bacteria are the most abundant living things on Earth. They live in almost all environments. They are found in the air, ocean, soil, and intestines of animals. They are even found in rocks deep below Earths surface. Any surface that has not been sterilized is likely to be covered wi... |
NDQ_009747 | ____rod-shaped bacterium | a. gram, b. spirillus, c. vector, d. bacillus, e. pathogen, f. coccus, g. antibiotic | d | Lesson: bacteria
Counting Bacteria:
Bacteria are the most abundant living things on Earth. They live in almost all environments. They are found in the air, ocean, soil, and intestines of animals. They are even found in rocks deep below Earths surface. Any surface that has not been sterilized is likely to be covered wi... |
NDQ_009748 | ____type of drug used to treat bacterial infections | a. gram, b. spirillus, c. vector, d. bacillus, e. pathogen, f. coccus, g. antibiotic | g | Lesson: bacteria
Counting Bacteria:
Bacteria are the most abundant living things on Earth. They live in almost all environments. They are found in the air, ocean, soil, and intestines of animals. They are even found in rocks deep below Earths surface. Any surface that has not been sterilized is likely to be covered wi... |
NDQ_009749 | ____organism that causes disease | a. gram, b. spirillus, c. vector, d. bacillus, e. pathogen, f. coccus, g. antibiotic | e | Lesson: bacteria
Counting Bacteria:
Bacteria are the most abundant living things on Earth. They live in almost all environments. They are found in the air, ocean, soil, and intestines of animals. They are even found in rocks deep below Earths surface. Any surface that has not been sterilized is likely to be covered wi... |
NDQ_009750 | ____spiral-shaped bacterium | a. gram, b. spirillus, c. vector, d. bacillus, e. pathogen, f. coccus, g. antibiotic | b | Lesson: bacteria
Counting Bacteria:
Bacteria are the most abundant living things on Earth. They live in almost all environments. They are found in the air, ocean, soil, and intestines of animals. They are even found in rocks deep below Earths surface. Any surface that has not been sterilized is likely to be covered wi... |
NDQ_009890 | early adulthood begins at age 16. | a. true, b. false | b | Lesson: adulthood and aging
Adulthood:
When is a person considered an adult? That depends. Most teens become physically mature by the age of 16 or so. But they are not adults in a legal sense until they are older. For example, in the U.S., you must be 18 to vote. Once adulthood begins, it can be divided into three sta... |
NDQ_009891 | late adulthood begins around age 65. | a. true, b. false | a | Lesson: adulthood and aging
Adulthood:
When is a person considered an adult? That depends. Most teens become physically mature by the age of 16 or so. But they are not adults in a legal sense until they are older. For example, in the U.S., you must be 18 to vote. Once adulthood begins, it can be divided into three sta... |
NDQ_009895 | middle adulthood is from about age | a. 35 to 50, b. 35 to 65, c. 30 to 60, d. 40 to 70 | b | Lesson: adulthood and aging
Adulthood:
When is a person considered an adult? That depends. Most teens become physically mature by the age of 16 or so. But they are not adults in a legal sense until they are older. For example, in the U.S., you must be 18 to vote. Once adulthood begins, it can be divided into three sta... |
NDQ_009896 | heart disease, cancer, and diabetes become more common during this time. | a. early adulthood, b. middle adulthood, c. late adulthood, d. any of the above | b | Lesson: adulthood and aging
Adulthood:
When is a person considered an adult? That depends. Most teens become physically mature by the age of 16 or so. But they are not adults in a legal sense until they are older. For example, in the U.S., you must be 18 to vote. Once adulthood begins, it can be divided into three sta... |
NDQ_009897 | during this time, brain changes cause mental abilities to decrease. | a. early adulthood, b. middle adulthood, c. late adulthood, d. any of the above | c | Lesson: adulthood and aging
Adulthood:
When is a person considered an adult? That depends. Most teens become physically mature by the age of 16 or so. But they are not adults in a legal sense until they are older. For example, in the U.S., you must be 18 to vote. Once adulthood begins, it can be divided into three sta... |
NDQ_009898 | during this time, most people complete their education. | a. early adulthood, b. middle adulthood, c. late adulthood, d. any of the above | a | Lesson: adulthood and aging
Adulthood:
When is a person considered an adult? That depends. Most teens become physically mature by the age of 16 or so. But they are not adults in a legal sense until they are older. For example, in the U.S., you must be 18 to vote. Once adulthood begins, it can be divided into three sta... |
NDQ_009899 | during this time, people have a harder time fighting diseases like the flu. | a. early adulthood, b. middle adulthood, c. late adulthood, d. any of the above | c | Lesson: adulthood and aging
Adulthood:
When is a person considered an adult? That depends. Most teens become physically mature by the age of 16 or so. But they are not adults in a legal sense until they are older. For example, in the U.S., you must be 18 to vote. Once adulthood begins, it can be divided into three sta... |
NDQ_009960 | aquatic biomes in the ocean are called marine biomes. | a. true, b. false | a | Lesson: aquatic biomes
Aquatic Biomes:
Recall that terrestrial biomes are defined by their climate. Thats because plants and animals are adapted for certain amounts of temperature and moisture. However, would aquatic biomes be classified in the same way? No, that wouldnt make much senseall parts of an aquatic environm... |
NDQ_009961 | wetlands may be either freshwater or salt water biomes. | a. true, b. false | b | Lesson: aquatic biomes
Aquatic Biomes:
Recall that terrestrial biomes are defined by their climate. Thats because plants and animals are adapted for certain amounts of temperature and moisture. However, would aquatic biomes be classified in the same way? No, that wouldnt make much senseall parts of an aquatic environm... |
NDQ_009965 | how are aquatic biomes defined? | a. by the amount of sunlight, their depth and their distance from land, b. by the aquatic organisms that inhabit the biome, c. by the salt concentration of the water, d. all of the above | a | Lesson: aquatic biomes
Aquatic Biomes:
Recall that terrestrial biomes are defined by their climate. Thats because plants and animals are adapted for certain amounts of temperature and moisture. However, would aquatic biomes be classified in the same way? No, that wouldnt make much senseall parts of an aquatic environm... |
NDQ_009966 | what area of the ocean will have the most oxygen and nutrients? | a. an area near the ocean floor far from the shore, b. an area near the surface and close to the shore, c. an area near the surface in the middle of the ocean, d. an area near the surface and close to the ocean floor in the middle of the ocean | b | Lesson: aquatic biomes
Aquatic Biomes:
Recall that terrestrial biomes are defined by their climate. Thats because plants and animals are adapted for certain amounts of temperature and moisture. However, would aquatic biomes be classified in the same way? No, that wouldnt make much senseall parts of an aquatic environm... |
NDQ_009967 | photosynthesis occurs in the | a. photosynthesis zone, b. aphotic zone, c. photic zone, d. sunlight zone | c | Lesson: aquatic biomes
Aquatic Biomes:
Recall that terrestrial biomes are defined by their climate. Thats because plants and animals are adapted for certain amounts of temperature and moisture. However, would aquatic biomes be classified in the same way? No, that wouldnt make much senseall parts of an aquatic environm... |
NDQ_009968 | why are estuaries considered marine biomes? | a. because sea urchins, octopuses, and sea stars live there, b. because there is a salt concentration greater than freshwater biomes, c. because these are places where freshwater streams or rivers merge with the ocean, d. all of the above | b | Lesson: aquatic biomes
Aquatic Biomes:
Recall that terrestrial biomes are defined by their climate. Thats because plants and animals are adapted for certain amounts of temperature and moisture. However, would aquatic biomes be classified in the same way? No, that wouldnt make much senseall parts of an aquatic environm... |
NDQ_009969 | which statement is characteristic of streams and rivers? | a. they are bodies of flowing water moving in one direction, b. they start at headwaters and empty into another body of water, c. they can be found everywhere, d. all of the above | d | Lesson: aquatic biomes
Aquatic Biomes:
Recall that terrestrial biomes are defined by their climate. Thats because plants and animals are adapted for certain amounts of temperature and moisture. However, would aquatic biomes be classified in the same way? No, that wouldnt make much senseall parts of an aquatic environm... |
NDQ_010010 | aids is an autoimmune disease. | a. true, b. false | b | Lesson: autoimmune diseases
Diseases of the Immune System:
The immune system usually protects you from pathogens and other causes of disease. When the immune system is working properly, it keeps you from getting sick. But the immune system is like any other system of the body. It can break down or develop diseases. AI... |
NDQ_010011 | people can die from an allergic reaction. | a. true, b. false | a | Lesson: autoimmune diseases
Diseases of the Immune System:
The immune system usually protects you from pathogens and other causes of disease. When the immune system is working properly, it keeps you from getting sick. But the immune system is like any other system of the body. It can break down or develop diseases. AI... |
NDQ_010015 | hay fever is an allergy to | a. hay, b. plant pollens, c. dust, d. mold | b | Lesson: autoimmune diseases
Diseases of the Immune System:
The immune system usually protects you from pathogens and other causes of disease. When the immune system is working properly, it keeps you from getting sick. But the immune system is like any other system of the body. It can break down or develop diseases. AI... |
NDQ_010016 | multiple sclerosis is an autoimmune disease in which the immune system attacks | a. nerve cells, b. muscle cells, c. the joints, d. brain cells | a | Lesson: autoimmune diseases
Diseases of the Immune System:
The immune system usually protects you from pathogens and other causes of disease. When the immune system is working properly, it keeps you from getting sick. But the immune system is like any other system of the body. It can break down or develop diseases. AI... |
NDQ_010017 | common allergies include allergies to | a. certain medicines, b. nuts and shellfish, c. dander, d. all of the above | d | Lesson: autoimmune diseases
Diseases of the Immune System:
The immune system usually protects you from pathogens and other causes of disease. When the immune system is working properly, it keeps you from getting sick. But the immune system is like any other system of the body. It can break down or develop diseases. AI... |
NDQ_010018 | inflammatory bowel disease is a severe autoimmune disease in which the immune system damages | a. the stomach, b. the bladder, c. the digestive tract, d. the kidney | c | Lesson: autoimmune diseases
Diseases of the Immune System:
The immune system usually protects you from pathogens and other causes of disease. When the immune system is working properly, it keeps you from getting sick. But the immune system is like any other system of the body. It can break down or develop diseases. AI... |
NDQ_010019 | autoimmune diseases can be cured with | a. diet changes, b. specific medicines, c. regular exercise, d. autoimmune diseases cannot be cured | d | Lesson: autoimmune diseases
Diseases of the Immune System:
The immune system usually protects you from pathogens and other causes of disease. When the immune system is working properly, it keeps you from getting sick. But the immune system is like any other system of the body. It can break down or develop diseases. AI... |
NDQ_010040 | there are more bacterial cells in your body than human cells. | a. true, b. false | a | Lesson: bacteria in the digestive system
Bacteria in the Digestive System:
Your large intestine is not just made up of cells. It is also an ecosystem, home to trillions of bacteria known as the "gut flora" ( Figure 1.1). But dont worry, most of these bacteria are helpful. Friendly bacteria live mostly in the large int... |
NDQ_010041 | there could be as many as 1,000 species of bacteria in your digestive system. | a. true, b. false | a | Lesson: bacteria in the digestive system
Bacteria in the Digestive System:
Your large intestine is not just made up of cells. It is also an ecosystem, home to trillions of bacteria known as the "gut flora" ( Figure 1.1). But dont worry, most of these bacteria are helpful. Friendly bacteria live mostly in the large int... |
NDQ_010045 | which bacteria help us digest plant food? | a. lactobacillus, b. bacteroides, c. e. coli, d. probiotic bacteria | b | Lesson: bacteria in the digestive system
Bacteria in the Digestive System:
Your large intestine is not just made up of cells. It is also an ecosystem, home to trillions of bacteria known as the "gut flora" ( Figure 1.1). But dont worry, most of these bacteria are helpful. Friendly bacteria live mostly in the large int... |
NDQ_010046 | bacteria live in all areas of the gastrointestinal tract except the | a. large intestine, b. small intestine, c. stomach, d. mouth | c | Lesson: bacteria in the digestive system
Bacteria in the Digestive System:
Your large intestine is not just made up of cells. It is also an ecosystem, home to trillions of bacteria known as the "gut flora" ( Figure 1.1). But dont worry, most of these bacteria are helpful. Friendly bacteria live mostly in the large int... |
NDQ_010047 | why are gut bacteria not attacked by the host immune system? | a. because the bacteria appear as digestive system cells, b. because the bacteria are covered sugars produced by the digestive system cells, c. because the immune system does not see these cells as foreign, d. all of the above | d | Lesson: bacteria in the digestive system
Bacteria in the Digestive System:
Your large intestine is not just made up of cells. It is also an ecosystem, home to trillions of bacteria known as the "gut flora" ( Figure 1.1). But dont worry, most of these bacteria are helpful. Friendly bacteria live mostly in the large int... |
NDQ_010048 | what is a role of digestive system bacteria? | a. break down fibers and some starches, b. break down poisons in the stomach, c. control the growth of helpful bacteria, d. all of the above are roles of digestive system bacteria | a | Lesson: bacteria in the digestive system
Bacteria in the Digestive System:
Your large intestine is not just made up of cells. It is also an ecosystem, home to trillions of bacteria known as the "gut flora" ( Figure 1.1). But dont worry, most of these bacteria are helpful. Friendly bacteria live mostly in the large int... |
NDQ_010049 | there are some plant foods that we cannot digest on our own. how do bacteria help us digest these foods? | a. bacteria produce enzymes that digest proteins in plant cells, b. bacteria produce enzymes that digest lipids in plant cell walls, c. bacteria produce enzymes that digest carbohydrates in plant cell walls, d. bacteria produce enzymes that digest carbohydrates in plant cell membranes | c | Lesson: bacteria in the digestive system
Bacteria in the Digestive System:
Your large intestine is not just made up of cells. It is also an ecosystem, home to trillions of bacteria known as the "gut flora" ( Figure 1.1). But dont worry, most of these bacteria are helpful. Friendly bacteria live mostly in the large int... |
NDQ_010050 | photosynthetic bacteria evolved before photosynthetic plants. | a. true, b. false | a | Lesson: bacteria nutrition
Bacteria Nutrition:
Like all organisms, bacteria need energy, and they can acquire this energy through a number of different ways.
Photosynthesis:
Photosynthetic bacteria use the energy of the sun to make their own food. In the presence of sunlight, carbon dioxide and water are turned into... |
NDQ_010051 | mutualistic bacteria kill their prey. | a. true, b. false | b | Lesson: bacteria nutrition
Bacteria Nutrition:
Like all organisms, bacteria need energy, and they can acquire this energy through a number of different ways.
Photosynthesis:
Photosynthetic bacteria use the energy of the sun to make their own food. In the presence of sunlight, carbon dioxide and water are turned into... |
NDQ_010055 | nitrogen gas in the atmosphere has a strong bond that cannot be broken by many organisms. instead bacteria break the bond so other organisms have access to the nitrogen. organisms need nitrogen to make | a. food, b. organelles, c. dna, d. cells | c | Lesson: bacteria nutrition
Bacteria Nutrition:
Like all organisms, bacteria need energy, and they can acquire this energy through a number of different ways.
Photosynthesis:
Photosynthetic bacteria use the energy of the sun to make their own food. In the presence of sunlight, carbon dioxide and water are turned into... |
NDQ_010056 | what type of bacteria lives in the roots of legumes, such as pea plants? | a. photosynthetic, b. mutualistic, c. decomposer, d. herbivore | b | Lesson: bacteria nutrition
Bacteria Nutrition:
Like all organisms, bacteria need energy, and they can acquire this energy through a number of different ways.
Photosynthesis:
Photosynthetic bacteria use the energy of the sun to make their own food. In the presence of sunlight, carbon dioxide and water are turned into... |
NDQ_010057 | what do decomposers obtain from the material they break down? | a. carbon, b. nutrients, c. energy, d. all of the above | d | Lesson: bacteria nutrition
Bacteria Nutrition:
Like all organisms, bacteria need energy, and they can acquire this energy through a number of different ways.
Photosynthesis:
Photosynthetic bacteria use the energy of the sun to make their own food. In the presence of sunlight, carbon dioxide and water are turned into... |
NDQ_010058 | which of the following is a photosynthetic bacterium? | a. staphylococcus aureus, b. escherichia coli, c. cyanobacteria, d. lactobacilli | c | Lesson: bacteria nutrition
Bacteria Nutrition:
Like all organisms, bacteria need energy, and they can acquire this energy through a number of different ways.
Photosynthesis:
Photosynthetic bacteria use the energy of the sun to make their own food. In the presence of sunlight, carbon dioxide and water are turned into... |
NDQ_010059 | the nitrogen cycle is the biogeochemical cycle that recycles nitrogen through ecosystems. which two types of bacteria are involved in the nitrogen cycle? | a. photosynthetic and chemotrophic, b. decomposers and photosynthetic, c. mutualistic and photosynthetic, d. mutualistic and chemotrophic | d | Lesson: bacteria nutrition
Bacteria Nutrition:
Like all organisms, bacteria need energy, and they can acquire this energy through a number of different ways.
Photosynthesis:
Photosynthetic bacteria use the energy of the sun to make their own food. In the presence of sunlight, carbon dioxide and water are turned into... |
NDQ_010070 | the first line of defense keeps most pathogens out of the body. | a. true, b. false | a | Lesson: barriers to pathogens
The Immune Systems First Line of Defense:
It is the immune systems job to protect the body. Your body has many ways to protect you from pathogens. Your bodys defenses are like a castle. The outside of a castle was protected by a moat and high walls. Inside the castle, soldiers were ready ... |
NDQ_010071 | the skin is a mucous membrane. | a. true, b. false | b | Lesson: barriers to pathogens
The Immune Systems First Line of Defense:
It is the immune systems job to protect the body. Your body has many ways to protect you from pathogens. Your bodys defenses are like a castle. The outside of a castle was protected by a moat and high walls. Inside the castle, soldiers were ready ... |
NDQ_010075 | which of the following are covered with mucous membranes? | a. the lining of the mouth, b. the lining of the throat, c. the inside of the lungs, d. all of the above | d | Lesson: barriers to pathogens
The Immune Systems First Line of Defense:
It is the immune systems job to protect the body. Your body has many ways to protect you from pathogens. Your bodys defenses are like a castle. The outside of a castle was protected by a moat and high walls. Inside the castle, soldiers were ready ... |
NDQ_010076 | what is a characteristic of the stomach? | a. the stomach is lined with cilia, which help remove pathogens, b. the stomach releases acid, which kills pathogens, c. the stomach is full of enzymes that kill bacteria, d. all of the above | b | Lesson: barriers to pathogens
The Immune Systems First Line of Defense:
It is the immune systems job to protect the body. Your body has many ways to protect you from pathogens. Your bodys defenses are like a castle. The outside of a castle was protected by a moat and high walls. Inside the castle, soldiers were ready ... |
NDQ_010077 | how do you think the flow of urine is involved in protection? | a. your urine flow flushes out pathogens from the bladder area, b. mucous in your urine removes pathogens, c. cilia in urine help remove pathogens, d. all of the above | a | Lesson: barriers to pathogens
The Immune Systems First Line of Defense:
It is the immune systems job to protect the body. Your body has many ways to protect you from pathogens. Your bodys defenses are like a castle. The outside of a castle was protected by a moat and high walls. Inside the castle, soldiers were ready ... |
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