question stringlengths 21 289 | support stringlengths 0 2.7k | choices listlengths 4 4 | answer stringclasses 4
values | source stringclasses 1
value |
|---|---|---|---|---|
What is often a result of untreated atherosclerosis? | [
"cancer",
"heart disease",
"a heart attack or stroke",
"seizures"
] | C | SCiQ | |
Once cells _______, they can no longer divide | Most plants continue to grow throughout their lives. Like other multicellular organisms, plants grow through a combination of cell growth and cell division. Cell growth increases cell size, while cell division (mitosis) increases the number of cells. As plant cells grow, they also become specialized into different cell... | [
"differentiate",
"propagate",
"migrate",
"mature"
] | A | SCiQ |
What is the first stage of cellular respiration? | [
"glycolysis",
"photosynthesis",
"amniocentesis",
"hydrolysis"
] | A | SCiQ | |
What kind of relay occurs between the uterus, hypothalamus, and the posterior pituitary to assure an adequate supply of the hormone oxytocin during childbirth? | Labor and Birth Labor is the physical efforts of expulsion of the fetus and the placenta from the uterus during birth (parturition). Toward the end of the third trimester, estrogen causes receptors on the uterine wall to develop and bind the hormone oxytocin. At this time, the baby reorients, facing forward and down wi... | [
"affirmative feedback",
"currents feedback",
"pressure feedback",
"positive feedback"
] | D | SCiQ |
What type of movement is caused by erosion from direct gravity? | Outline the forces that act on particles in the nucleus. | [
"electron movement",
"frictional movement",
"mass movement",
"normal movement"
] | C | SCiQ |
A catalyst decreases the amount of what resource that is required in order to begin a chemical reaction? | Catalysts are not reactants, but they help reactants come together so they can react. You can see one way this happens in the animation at the URL below. By helping reactants come together, a catalyst decreases the activation energy needed to start a chemical reaction. This speeds up the reaction. | [
"motion energy",
"kinetic energy",
"positive energy",
"activation energy"
] | D | SCiQ |
Many adolescents experience frequent mood swings. name one of the causes for this. | Adolescents may have mood swings because of surging hormones. | [
"surging hormones",
"psychological changes",
"maturing nervous system",
"growing hormones"
] | A | SCiQ |
Mammals have four limbs and produce what kind of eggs? | Mammals have four limbs and produce amniotic eggs. | [
"placental",
"umbilical",
"amniotic",
"hard-shelled"
] | C | SCiQ |
What are the two methods in which mutations arise in dna? | Errors during DNA replication are not the only reason why mutations arise in DNA. Mutations, variations in the nucleotide sequence of a genome, can also occur because of damage to DNA. Such mutations may be of two types: induced or spontaneous. Induced mutations are those that result from an exposure to chemicals, UV r... | [
"accelerated or random",
"induced or spontaneous",
"produced or spontaneous",
"accelerated or spontaneous"
] | B | SCiQ |
How many pi bonds are found in a triple bond? | From the stirrup, the vibrations pass to the oval window . This is another membrane like the eardrum. | [
"four",
"10",
"two",
"six"
] | C | SCiQ |
Sodium and chlorine combine to make what? | Sodium is a highly reactive metal, and chlorine is a poisonous gas (see Figure below ). The compound they synthesize has very different properties. It is table salt, which is neither reactive nor poisonous. In fact, salt is a necessary component of the human diet. | [
"seawater",
"salt",
"iron",
"gold"
] | B | SCiQ |
The fundamental unit of time, the second, is based on what type of clock? | Figure 1.18 An atomic clock such as this one uses the vibrations of cesium atoms to keep time to a precision of better than a microsecond per year. The fundamental unit of time, the second, is based on such clocks. This image is looking down from the top of an atomic fountain nearly 30 feet tall! (credit: Steve Jurvets... | [
"gravity clock",
"quantum clock",
"eternal clock",
"atomic clock"
] | D | SCiQ |
What are the primary cells of adaptive immune response? | Lymphocytes: B Cells, T Cells, Plasma Cells, and Natural Killer Cells As stated above, lymphocytes are the primary cells of adaptive immune responses (Table 21.1). The two basic types of lymphocytes, B cells and T cells, are identical morphologically with a large central nucleus surrounded by a thin layer of cytoplasm.... | [
"red blood cells",
"lymphocytes",
"erythrocytes",
"white blood cells"
] | B | SCiQ |
What blood pressure reading measures the pressure in the vessels between heartbeats? | 40.4 | Blood Flow and Blood Pressure Regulation By the end of this section, you will be able to: • Describe the system of blood flow through the body • Describe how blood pressure is regulated Blood pressure (BP) is the pressure exerted by blood on the walls of a blood vessel that helps to push blood through the body. ... | [
"metabolic",
"systolic",
"diastolic",
"plasma"
] | C | SCiQ |
When an atom gains or loses an electron it becames an? | Sometimes atoms lose or gain electrons. Then they become ions . Ions have a positive or negative charge. That’s because they do not have the same number of electrons as protons. If atoms lose electrons, they become positive ions, or cations. If atoms gain electrons, they become negative ions, or anions. | [
"electron",
"photon",
"neutron",
"ion"
] | D | SCiQ |
What reaction is considered the reverse of photosynthesis? | Many important biological processes involve redox reactions, which frequently store and release energy. For example, photosynthesis involves the reduction of carbon dioxide into glucose and the oxidation of water into oxygen. This process stores the energy of sunlight in the bonds of sugars. The reverse reaction, cellu... | [
"cellular transfer",
"cellular respiration",
"cellular digestion",
"cellular decay"
] | B | SCiQ |
The ratio between the radii of a wheel and axle determines what? | Just like it sounds, a wheel and axle is composed of two connected cylinders of different diameters. Since the wheel has a larger radius (distance) than the axle, the axle will always have a larger force than the wheel. The ideal mechanical advantage of a wheel and axle is dependent on the ratio between the radii:. | [
"ideal mechanical advantage",
"fundamental mechanical advantage",
"theoretical mechanical advantage",
"introduced mechanical advantage"
] | A | SCiQ |
Connective tissues typically have three characteristic components in common: cells, large amounts of amorphous ground substance, and what else? | 4.3 | Connective Tissue Supports and Protects By the end of this section, you will be able to: • Identify and distinguish between the types of connective tissue: proper, supportive, and fluid • Explain the functions of connective tissues As may be obvious from its name, one of the major functions of connective tissue i... | [
"protein fibers",
"antioxidants",
"white blood cells",
"hormones"
] | A | SCiQ |
Dietary proteins are broken down into amino acids during what process? | Proteins in the diet are necessary for life. Dietary proteins are broken down into their component amino acids when food is digested. Cells can then use the components to build new proteins. Humans are able to synthesize all but eight of the twenty common amino acids. These eight amino acids, called essential amino aci... | [
"photosynthesis",
"digestion",
"filtration",
"accumulation"
] | B | SCiQ |
The two complementary strands of what are separated, much like unzipping a zipper, in the initiation phase? | Stage 1: Initiation. The two complementary strands are separated, much like unzipping a zipper. Special enzymes, including helicase, untwist and separate the two strands of DNA. Stage 2: Elongation. Each strand becomes a template along which a new complementary strand is built. DNA polymerase brings in the correct base... | [
"RNA",
"dna",
"Chromosomes",
"mRNA"
] | B | SCiQ |
Population growth is determined by rates of birth, death, immigration, and what else? | Population growth is determined by rates of birth, death, immigration, and emigration. | [
"emigration",
"exploitation",
"excitation",
"relaxation"
] | A | SCiQ |
Lungs, pharynx, larynx, trachea, and bronchi are part of which system? | The organs of the respiratory system include the lungs, pharynx, larynx, trachea, and bronchi. | [
"nervous",
"neural",
"digestive",
"respiratory"
] | D | SCiQ |
When what common element forms single bonds with other atoms, the shape is tetrahedral, and when its atoms form a double bond, the shape is planar? | Figure 2.22 When carbon forms single bonds with other atoms, the shape is tetrahedral. When two carbon atoms form a double bond, the shape is planar, or flat. Single bonds, like those found in ethane, are able to rotate. Double bonds, like those found in ethene cannot rotate, so the atoms on either side are locked in p... | [
"oxygen",
"carbon",
"silicon",
"hydrogen"
] | B | SCiQ |
If both atoms are the same, they have the same electronegativity and share what type of bond? | [
"nonpolar covalent",
"isotopic covalent",
"ionic",
"metabolic"
] | A | SCiQ | |
What occurs when rain falls more quickly than water can be absorbed into the ground or carried away by rivers or streams? | Floods may occur when deep snow melts quickly in the spring. More often, floods are due to heavy rainfall. Floods happen when rain falls more quickly than water can be absorbed into the ground or carried away by rivers or streams. | [
"greenhouse effect",
"typhoons",
"floods",
"landslides"
] | C | SCiQ |
What is the special name given to the diffusion of water through the cell membrane? | If a molecule can pass freely through a cell membrane, it will cross the membrane by diffusion ( Figure below ). The inside of the plasma membrane is hydrophobic, so certain molecules cannot easily pass through the membrane. Recall the semipermeable nature of the lipid bilayer. Molecules that cannot easily pass through... | [
"passive transport",
"hemostasis",
"osmosis",
"electrolysis"
] | C | SCiQ |
As the atoms approach one another, their electron clouds gradually begin to do what? | As the atoms approach one another, their electron clouds gradually begin to overlap. Now there are several interactions which begin to occur. One is that the single electrons that each hydrogen atom possesses begin to repel each other. This repulsive force would tend to make the potential energy of the system increase.... | [
"shrink",
"magnetize",
"overlap",
"disappear"
] | C | SCiQ |
What is a hydrocarbon in which there are only single covalent bonds? | An alkane is a hydrocarbon in which there are only single covalent bonds. The simplest alkane is methane, with the molecular formula CH 4 . The carbon is the central atom and makes four single covalent bonds to hydrogen atoms. | [
"fullerene",
"proline",
"alkane",
"combined"
] | C | SCiQ |
What type of muscle is found in the walls of other internal organs such as the stomach? | Smooth muscle is found in the walls of other internal organs such as the stomach. It isn’t striated because its muscle fibers are arranged in sheets rather than bundles. Contractions of smooth muscle are involuntary. When smooth muscles in the stomach contract, they squeeze food inside the stomach. This helps break the... | [
"Tube Muscle",
"inorganic muscle",
"smooth muscle",
"Fiber Muscle"
] | C | SCiQ |
When we neutralize a weak base with a strong acid, the product is ________ containing the conjugate acid of the weak base. | Salts of Weak Bases and Strong Acids When we neutralize a weak base with a strong acid, the product is a salt containing the conjugate acid of the weak base. This conjugate acid is a weak acid. For example, ammonium chloride, NH4Cl, is a salt formed by the reaction of the weak base ammonia with the strong acid HCl: NH ... | [
"salt",
"an ion",
"water",
"an electron"
] | A | SCiQ |
What kind of tissue consists of trabeculae and forms the inner layer of all bones? | Chapter 38 1 Figure 38.19B 3 Figure 38.38 In the presence of Sarin, acetycholine is not removed from the synapse, resulting in continuous stimulation of the muscle plasma membrane. At first, muscle activity is intense and uncontrolled, but the ion gradients dissipate, so electrical signals in the T-tubules are no longe... | [
"denser bone tissue",
"corregated bone tissue",
"flotsam bone tissue",
"spongy bone tissue"
] | D | SCiQ |
Engaging in relatively simple behaviors helps maintain a nearly constant body temperature for organisms classified as what? | [
"endotherms",
"photophores",
"ectotherms",
"placoderms"
] | C | SCiQ | |
Sickle cell disease is caused by production of an abnormal type of what? | down into three major groups: those caused by blood loss, those caused by faulty or decreased RBC production, and those caused by excessive destruction of RBCs. Clinicians often use two groupings in diagnosis: The kinetic approach focuses on evaluating the production, destruction, and removal of RBCs, whereas the morph... | [
"fat globule",
"thrombocyte",
"leukocyte",
"hemoglobin"
] | D | SCiQ |
What is the term for going into a dormant state during the winter? | [
"hibernation",
"gestation",
"fermentation",
"homeostasis"
] | A | SCiQ | |
Which factor causes a cannon ball to move horizontally and then fall on the ground? | Earth’s gravity also affects the acceleration of objects that start out moving horizontally, or parallel to the ground. Look at Figure below . A cannon shoots a cannon ball straight ahead, giving the ball horizontal motion. At the same time, gravity pulls the ball down toward the ground. Both forces acting together cau... | [
"fluid motion",
"cone motion",
"downward motion",
"projectile motion"
] | D | SCiQ |
What type of plants were the first to evolve? | Nonvascular plants were the first plants to evolve. Compared to other plants, their small size and lack of specialized structures, such as vascular tissue, stems, leaves, or flowers, explains why these plants evolved first. The first nonvascular plants to evolve were the liverworts. The hornworts evolved somewhat later... | [
"vascular",
"cocklebur",
"nonvascular",
"kilocalorie"
] | C | SCiQ |
There is a positive correlation between the ability to conduct thermal energy and what other energy, as exemplified by metals? | Your feet feel cold as you walk barefoot across the living room carpet in your cold house and then step onto the kitchen tile floor. This result is intriguing, since the carpet and tile floor are both at the same temperature. The different sensation you feel is explained by the different rates of heat transfer: the hea... | [
"electricity",
"nuclear",
"elastic",
"gravitational"
] | A | SCiQ |
What type of energy travels through space as electrical and magnetic waves? | 4. Electromagnetic energy is energy that travels through space as electrical and magnetic waves. The light flooding the stage in the Figure above is one type of electromagnetic energy. Other types include radio waves, microwaves, X rays, and gamma rays. | [
"mechanical energy",
"solar energy",
"electromagnetic energy",
"sound energy"
] | C | SCiQ |
Respiratory therapists or respiratory practitioners evaluate and treat patients diseases affecting what part of the body? | Respiratory Therapist Respiratory therapists or respiratory practitioners evaluate and treat patients with lung and cardiovascular diseases. They work as part of a medical team to develop treatment plans for patients. Respiratory therapists may treat premature babies with underdeveloped lungs, patients with chronic con... | [
"byproduct , heart , and blood vessels",
"heart, lungs, stomach",
"brain, stomach, heart",
"lung, heart, and blood vessels"
] | D | SCiQ |
What is the series of changes in the life of an organism? | Organisms that have a diploid life cycle spend the majority of their lives as diploid adults. All diploid adults inherit half of their DNA from each parent. When they are ready to reproduce, diploid reproductive cells undergo meiosis and produce haploid gametes. These gametes then fuse through fertilization and produce... | [
"circle of life",
"life cycle",
"evolution",
"insect metamorphosis"
] | B | SCiQ |
What type of bond forms by unpaired electrons from two atoms "matching up"? | You have learned that a covalent bond forms when the electron clouds of two atoms overlap with each other. In a simple H 2 molecule, the single electron in each atom becomes attracted to the nucleus of the other atom in the molecule as the atoms come closer together. An optimum distance, equal to the bond length, is ev... | [
"magnetic bond",
"covalent bond",
"reactive bond",
"accretion bond"
] | B | SCiQ |
What organ has four ventricles, all of which developed from the original hollow space within the neural tube? | The Ventricles There are four ventricles within the brain, all of which developed from the original hollow space within the neural tube, the central canal. The first two are named the lateral ventricles and are deep within the cerebrum. These ventricles are connected to the third ventricle by two openings called the in... | [
"heart",
"brain",
"bladder",
"liver"
] | B | SCiQ |
What are the ends of long bones called? | Long bones ossify and get longer as they grow and develop. These bones grow from their ends, known as the epiphysis, and the presence of a growth plate, or epiphyseal line, signifies that the bone is still growing. | [
"appendage",
"epiphysis",
"marrow extension",
"cartilage"
] | B | SCiQ |
The structural classification of joints divides them into bony, fibrous, cartilaginous, and synovial joints. the bones of fibrous joints are held together by fibrous connective tissue; the three types of fibrous joints are sutures, syndesomes, and what? | 38.3 Joints and Skeletal Movement The structural classification of joints divides them into bony, fibrous, cartilaginous, and synovial joints. The bones of fibrous joints are held together by fibrous connective tissue; the three types of fibrous joints are sutures, syndesomes, and gomphoses. Cartilaginous joints are jo... | [
"articular",
"cartilaginous",
"synchondrosis",
"gomphoses"
] | D | SCiQ |
Changes in temperature, ph, and exposure to chemicals may lead to permanent changes in the shape of a protein, leading to loss of function known as what? | Proteins have different shapes and molecular weights; some proteins are globular in shape whereas others are fibrous in nature. For example, hemoglobin is a globular protein, but collagen, found in our skin, is a fibrous protein. Protein shape is critical to its function, and this shape is maintained by many different ... | [
"denaturation",
"bioturbation",
"digestion",
"fermentation"
] | A | SCiQ |
Which organisms capture light energy and convert it to chemical energy inside their cell? | Phototrophs are organisms that capture light energy and convert it to chemical energy inside their cell. Most phototrophs are the autotrophs that perform photosynthesis, which are also known as photoautotrophs. These organisms have the ability to fix carbon from carbon dioxide into organic compounds, such as glucose. C... | [
"sporozoans",
"pores",
"phototrophs",
"chloroplasts"
] | C | SCiQ |
What are microscopic vessels with very thin, porous walls? | [
"arteries",
"veins",
"valves",
"capillaries"
] | D | SCiQ | |
What term describes a specific statement that is thought to be never violated by the entire natural universe? | A scientific law is a specific statement that is thought to be never violated by the entire natural universe. Everyday laws are arbitrary limits that society puts on its members. | [
"scientific law",
"hypothesis",
"evidence",
"theory"
] | A | SCiQ |
What do the letters in our blood types represent? | Another exception to Mendel's laws is a phenomenon called codominance . For example, our blood type shows codominance. Do you know what your blood type is? Are you A? O? AB? Those letters actually represent alleles. Unlike other traits, your blood type has three alleles, instead of two!. | [
"genomes",
"alleles",
"proteins",
"iron levels"
] | B | SCiQ |
When organisms penetrate a rock, they accelerate breakdown by chemical means and what other means? | [
"mechanical",
"ecological",
"geological",
"temperature"
] | A | SCiQ | |
During what time period did poor air quality become a problem? | Poor air quality started to become a serious problem after the Industrial Revolution. The machines in factories burned coal. This released a lot of pollutants into the air. After 1900, motor vehicles became common. Cars and trucks burn gasoline, which adds greatly to air pollution. | [
"industrial revolution",
"second world war",
"Chernobyl disaster",
"coal industry boom"
] | A | SCiQ |
Named after the dutch physicist, the van de graaff is a type of what device used for nuclear research? | Early Accelerators An early accelerator is a relatively simple, large-scale version of the electron gun. The Van de Graaff (named after the Dutch physicist), which you have likely seen in physics demonstrations, is a small version of the ones used for nuclear research since their invention for that purpose in 1932. For... | [
"radiation detector",
"accelerator",
"barometer",
"electromagnetic"
] | B | SCiQ |
What term describes the number and kinds of species in a location or on the planet? | Types of Biodiversity Scientists generally accept that the term biodiversity describes the number and kinds of species in a location or on the planet. Species can be difficult to define, but most biologists still feel comfortable with the concept and are able to identify and count eukaryotic species in most contexts. B... | [
"habitat",
"Allopatric speciation",
"biodiversity",
"ecosystem"
] | C | SCiQ |
What have a symbiotic relationship between a fungus and a photosynthetic organism? | farm fungi as a supply of food. Lichens are a symbiotic relationship between a fungus and a photosynthetic organism, usually an alga or cyanobacterium. The photosynthetic organism provides energy derived from light and carbohydrates, while the fungus supplies minerals and protection. Some animals that consume fungi hel... | [
"amphibians",
"sponges",
"lichens",
"crustaceans"
] | C | SCiQ |
What size of ring will a summer drought cause in a tree? | You can tell other things from tree rings too. In a good year a tree will produce a wide ring. A summer drought will produce a smaller ring. These variations will appear in all trees in a region. The same pattern can be found in all the trees in the area. This pattern helps scientist to identify a particular time perio... | [
"giant",
"smaller",
"larger",
"medium"
] | B | SCiQ |
What type of rain dissolves limestone and marble? | Figure below shows some of the damage done by acid rain. Acid rain ends up in soil and bodies of water. This can make them very acidic. The acid strips soil of its nutrients. These changes can kill trees, fish, and other living things. Acid rain also dissolves limestone and marble. This can damage buildings, monuments,... | [
"acid",
"carbon",
"natural",
"sulfur"
] | A | SCiQ |
What is the earliest reptile? | Earliest Reptile: Hylonomus. The earliest known reptile is given the genus name Hylonomus. It was about 20 to 30 centimeters (8 to 12 inches) long, lived in swamps, and ate insects and other small invertebrates. | [
"sporozoans",
"pliosaur",
"hylonomus",
"staurikosaurus"
] | C | SCiQ |
What mineral is used to produce glass? | Silver is used to make sterling silver jewelry. Table salt is the mineral halite. Glass is produced from the mineral quartz. | [
"lead",
"quartz",
"pyrite",
"feldspar"
] | B | SCiQ |
What is the most abundant biochemical compound, making up the cell walls of plants? | Cellulose is the most abundant biochemical compound. It makes up the cell walls of plants and gives support to trunks and stems. Cellulose also provides needed fiber in the human diet. We can’t digest cellulose, but it helps keep food wastes moving through the digestive tract. | [
"mitochondria",
"cellulose",
"cytoplasm",
"magnesium"
] | B | SCiQ |
Essential minerals that the body needs in tiny quantities are called what? | Food and Drink App: Vitamins and Minerals Vitamins are nutrients that our bodies need in small amounts but cannot synthesize; therefore, they must be obtained from the diet. The word vitamin comes from “vital amine” because it was once thought that all these compounds had an amine group (NH2) in it. This is not actuall... | [
"draw minerals",
"byproduct minerals",
"flux minerals",
"trace minerals"
] | D | SCiQ |
Which division of the peripheral nervous system carries messages from sense organs and internal organs to the central nervous system? | All other nervous tissue in the body makes up the peripheral nervous system, which has two major divisions. The sensory division carries messages from sense organs and internal organs to the central nervous system. The motor division carries messages from the central nervous system to muscles, internal organs, and glan... | [
"vascular division",
"sensory division",
"neural division",
"extrasensory division"
] | B | SCiQ |
Why do birds need a light-weight body? | Birds need a light-weight body in order to stay aloft. Even so, flying is hard work, and flight muscles need a constant supply of oxygen- and nutrient-rich blood. The organ systems of birds are adapted to meet these needs. | [
"to stay aloft",
"water flotation",
"for cooling",
"food shortages"
] | A | SCiQ |
Tremetol, a metabolic poison found in the white snake root plant, prevents the metabolism of what? | Tremetol, a metabolic poison found in the white snake root plant, prevents the metabolism of lactate. When cows eat this plant, it is concentrated in the milk they produce. Humans who consume the milk become ill. Symptoms of this disease, which include vomiting, abdominal pain, and tremors, become worse after exercise.... | [
"lipids",
"sugars",
"sodium",
"lactate"
] | D | SCiQ |
From observations as simple as blowing up a balloon, it is clear that increasing the amount of gas increases what else? | The combined gas law, , is true for a particular sample of gas. If any gas is added or allowed to leak out, however, the relationship is lost. In order to get a relationship that is true for any sample of gas, it is necessary to incorporate a term for the amount of gas. From observations as simple as blowing up a ballo... | [
"every volume",
"the volume",
"area",
"the shift"
] | B | SCiQ |
What color and shape are cumulus clouds? | Cumulus clouds are white and puffy. Convection currents make them grow upward, and they may grow very tall. When they produce rain, they are called cumulonimbus. | [
"white and puffy",
"dark and tall",
"white and wispy",
"dark and wispy"
] | A | SCiQ |
When struck, how are the rigid crystals of ionic compounds likely to react? | The rigid crystals of ionic compounds are brittle. They are more likely to break than bend when struck. As a result, ionic crystals tend to shatter easily. Try striking salt crystals with a hammer and you’ll find that they readily break into smaller pieces. You can learn more about the properties of ionic compounds by ... | [
"break",
"bend",
"grow",
"shrink"
] | A | SCiQ |
What illnesses are caused by damage to the alveoli of the lungs? | Pneumonia and emphysema are caused by damage to the alveoli of the lungs. | [
"smoking and emphysema",
"chronic and emphysema",
"avian and emphysema",
"pneumonia and emphysema"
] | D | SCiQ |
What has atoms with unstable nuclei? | A radioisotope has atoms with unstable nuclei. Unstable nuclei naturally decay, or break down. They lose energy and particles and become more stable. As nuclei decay, they gain or lose protons, so the atoms become different elements. This is illustrated in the Figure below . The original, unstable nucleus is called the... | [
"microwaves",
"hydrocarbon",
"radionuclide",
"radioisotope"
] | D | SCiQ |
What color is pyrite? | Pyrite has a similar color to gold. The appearance of the striations make pyrite different from gold. | [
"blue",
"silver",
"black",
"gold"
] | D | SCiQ |
What is contained in the skin of brightly colored poison dart frogs? | Adrian Pingstone (Wikimedia: Arpingstone). Brightly colored poison dart frogs have toxins in their skin . Public Domain. | [
"acid",
"poison",
"spores",
"toxins"
] | D | SCiQ |
What is the smallest particle of an element that still has the properties of that element is called? | The smallest particle of an element that still has the properties of that element is an atom. Atoms are extremely tiny. They can be observed only with an electron microscope. They are commonly represented by models, like the one Figure below . An atom has a central nucleus that is positive in charge. The nucleus is sur... | [
"neutron",
"nucleus",
"proton",
"atom"
] | D | SCiQ |
What produces all the cells of the root and the root cap? | [
"interior meristem",
"somatic meristem",
"apical meristem",
"algal meristem"
] | C | SCiQ | |
Mirrors and lenses are used in optical instruments to reflect and refract what? | Mirrors and lenses are used in optical instruments to reflect and refract light. Optical instruments include microscopes, telescopes, cameras, and lasers. | [
"gravity",
"mass",
"electricity",
"light"
] | D | SCiQ |
Ionic compounds take on the form of extended three-dimensional arrays of cations and what else? | Ionic compounds take on the form of extended three-dimensional arrays of cations and anions. | [
"electrons",
"crystals",
"oxides",
"anions"
] | D | SCiQ |
Coal is a solid hydrocarbon formed from what type of decaying material? | Coal is a solid hydrocarbon formed from decaying plant material over millions of years. | [
"insects",
"soil",
"plant",
"mammals"
] | C | SCiQ |
What is the most common cause of dwarfism? | Whereas cystic fibrosis, Tay-Sachs, and phenylketonuria are all autosomal recessive disorders, achondroplasia is an autosomal dominant disorder. Achondroplasia is the most common cause of dwarfism in humans. Achondroplasia is a result of an autosomal dominant mutation in the fibroblast growth factor receptor gene 3 (FG... | [
"hypothyroidism",
"deformity",
"achondroplasia",
"retinopathy"
] | C | SCiQ |
What system of the body uses amylase and pepsin in its functioning? | Top: Flickr:LearningLark; Bottom: Laura Guerin (CK-12 Foundation). Amylase and pepsin are used in our digestive system . Top: CC BY 2.0; Bottom: CC BY-NC 3.0. | [
"hormonal system",
"respiratory system",
"circulatory system",
"digestive system"
] | D | SCiQ |
What does the large central vacuole do? | First, plant cells have a large central vacuole that holds a mixture of water, nutrients, and wastes. A plant cell's vacuole can make up 90% of the cell’s volume. The large central vacuole essentially stores water. In animal cells, vacuoles are much smaller. | [
"store water",
"use water",
"create glucose",
"heat water"
] | A | SCiQ |
What is used to record seismic waves? | A seismograph is a machine that records seismic waves. In the past, seismographs produced a seismogram . A seismogram is a paper record of the seismic waves the seismograph received. Seismographs have a weighted pen suspended from a stationary frame. A drum of paper is attached to the ground. As the ground shakes in an... | [
"seismograph",
"topometer",
"odometer",
"transmitter"
] | A | SCiQ |
In a ketone, two of which kind of groups are attached to the carbonyl carbon atom? | Note The carbonyl group is ubiquitous in biological compounds. It is found in carbohydrates, fats, proteins, nucleic acids, hormones, and vitamins—organic compounds critical to living systems. In a ketone, two carbon groups are attached to the carbonyl carbon atom. The following general formulas, in which R represents ... | [
"nitrogen groups",
"ions",
"carbon groups",
"oxygen groups"
] | C | SCiQ |
What type of disease can be treated by radioactive elements in glucose? | Despite its dangers, radioactivity has several uses. It can be used to determine the ages of ancient rocks and fossils. This use of radioactivity is explained in this chapter’s "Radioactive Decay" lesson. Radioactivity can also be used as a source of power to generate electricity. This use of radioactivity is covered l... | [
"cancer",
"infection",
"genetic disorder",
"mutation"
] | A | SCiQ |
Energy comes in discrete packages called what? | Energy comes in discrete packages called quanta. | [
"quasar",
"quanta",
"quasi",
"quota"
] | B | SCiQ |
What is the temperature where molecular motion stops? | Absolute zero is the temperature where molecular motion stops and is the lowest possible temperature. | [
"Final Zero",
"absolute zero",
"Absolute Freezing",
"mean zero"
] | B | SCiQ |
What is calculated by subtracting the smallest value from the largest value? | The range is the total spread of values. It gives you an idea of the variation in the measurements. The range is calculated by subtracting the smallest value from the largest value. For the data in Table above , the range in numbers of vehicles by type is: 150 - 50 = 100. | [
"the sample",
"the range",
"the median",
"the density"
] | B | SCiQ |
Light can be used to eject what from a solid material? | Under the right conditions, light can be used to eject electrons from a solid material. | [
"calories",
"electrons",
"protons",
"neutrons"
] | B | SCiQ |
The epidermis consists mainly of what type of cells? | Cell Layers of the Epidermis. The epidermis consists mainly of epithelial cells. | [
"epithelial",
"cytoplasm",
"blood cells",
"crystalline"
] | A | SCiQ |
How do birds learn to avoid eating monarch butterflies? | Birds learn through conditioning to avoid eating monarch butterflies. | [
"digestion",
"temperature",
"instinct",
"conditioning"
] | D | SCiQ |
How many weeks are in the life cycle of ladybugs | Ladybugs, also known as ladybird beetles, have a life cycle of four to six weeks. In one year, as many as six generations of ladybird beetles may hatch. In the spring, each adult female lays up to 300 eggs in small clusters on plants where aphids are present. After a week, the wingless larvae hatch. Both the ladybird b... | [
"three to six",
"two to four",
"nine to six",
"four to six"
] | D | SCiQ |
Insulin and glucagon help keep blood glucose levels in the normal range because of what type of effects? | [
"antagonistic",
"opportunistic",
"ABNORMALISTIC",
"sympathetic"
] | A | SCiQ | |
What are mudskipper fish able to do in short distances? | Thomas H Brown. Mudskippers are fish that are able to walk short distances . CC-BY 2.0. | [
"spit",
"walk",
"run",
"tumble"
] | B | SCiQ |
What organism is an important pioneer on cleared rock and soil surfaces, such as volcanic flows and burned forests? | [
"lichen",
"algae",
"cysts",
"pigment"
] | A | SCiQ | |
What is the term for a mixture that varies in its composition? | The rock in Figure above is an example of a heterogeneous mixture. A heterogeneous mixture varies in its composition. The black nuggets, for example, are not distributed evenly throughout the rock. | [
"amorphous",
"mixed composition",
"homogeneous",
"heterogeneous"
] | D | SCiQ |
The heme parts of a hemoglobin molecule bind with what element? | Hemoglobin is an example of a transport protein in the blood. You can see how it works in Figure below . The heme parts of a hemoglobin molecule bind with oxygen. Each red blood cell has hundreds of hemoglobin molecules. This is how oxygen is carried in the blood to cells throughout the body. | [
"nitrogen",
"hydrogen",
"carbon",
"oxygen"
] | D | SCiQ |
What are large sheets of ice that cover relatively flat ground called? | Continental glaciers are large ice sheets that cover relatively flat ground. These glaciers flow outward from where the greatest amounts of snow and ice accumulate. | [
"continental glaciers",
"rocky glaciers",
"cellular glaciers",
"land glaciers"
] | A | SCiQ |
What is the hinged structure attached to the cranium that allows an animal to grasp and tear its food? | Gnathostomes: Jawed Fishes Gnathostomes or “jaw-mouths” are vertebrates that possess jaws. One of the most significant developments in early vertebrate evolution was the development of the jaw, which is a hinged structure attached to the cranium that allows an animal to grasp and tear its food. The evolution of jaws al... | [
"jaw",
"tooth",
"neck",
"throat"
] | A | SCiQ |
What type of organisms do carnivores feed on? | Carnivores feed on animals, either herbivores or other carnivores. Snakes that eat mice are carnivores. Hawks that eat snakes are also carnivores ( Figure below ). | [
"plants",
"eggs",
"animals",
"decomposers"
] | C | SCiQ |
Because it damages hair cells, what is the most cause of hearing loss in adults? | Most adults experience at least some hearing loss as they get older. The most common cause is exposure to loud sounds, which damage hair cells. The louder a sound is, the less exposure is needed for damage to occur. Even a single brief exposure to a sound louder than 115 decibels can cause hearing loss. Figure below sh... | [
"bacteria",
"ear wax",
"water in the ears",
"exposure to noise"
] | D | SCiQ |
What can be used to determine the mass of a quantity of material? | Molar masses can be used to determine the mass of a given quantity of material. | [
"inertial mass",
"gravitational mass",
"atomic masses",
"molar masses"
] | D | SCiQ |
What are the largest phylum of the animal kingdom? | Two chemical species combine to produce a new compound. The general expression for this reaction is A + B → C. | [
"Crustacea",
"Chelicerata",
"arthropods",
"Pycnogonida"
] | C | SCiQ |
What type of dating determines which of two fossils is older or younger than the other but not their age in years? | Relative dating determines which of two fossils is older or younger than the other but not their age in years. Relative dating is based on the positions of fossils in rock layers. Lower rock layers were laid down earlier, so they are assumed to contain older fossils. This is illustrated in Figure below . | [
"normal",
"relative",
"normative",
"constant"
] | B | SCiQ |
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