prompt stringlengths 51 646 | completion stringclasses 8 values | source stringclasses 3 values |
|---|---|---|
What type of lens and mirrors have a negative focal length?
A. convexing
B. diverging
C. converging
D. subverging
Answer: | B | sciq |
What is the formation of organs from the germ layers called?
A. biosynthesis
B. organogenesis
C. synaptogenesis
D. photosynthesis
Answer: | B | sciq |
What must two nuclei do for fusion to occur?
A. explode
B. melt
C. repel each other
D. collide
Answer: | D | sciq |
What determines the ability of soil particles to bind many nutrients?
A. surface charges
B. surface pulses
C. layer charges
D. currents charges
Answer: | A | sciq |
Enthalpy is a measure of the total energy of what kind of system?
A. macroscopic
B. thermodynamic
C. planetary
D. hypodermic
Answer: | B | sciq |
In eukaryotes, the new mrna is not yet ready for translation. it must go through more processing before it leaves where?
A. protons
B. Electrons
C. molecules
D. nucleus
Answer: | D | sciq |
What term describes the splitting of the nucleus of an atom into two smaller nuclei?
A. atomic reaction
B. nuclean fusion
C. nuclear fission
D. critical fission
Answer: | C | sciq |
What type of contamination causes almost 90% of diarrheal disease worldwide?
A. food contamination
B. ground contamination
C. air contamination
D. water supply contamination
Answer: | D | sciq |
Why is respiratory acidosis considered to be problematic?
A. causes acid stomach
B. excess oxygen in blood
C. excess co2 in blood
D. causes suffocation
Answer: | C | sciq |
When light strikes rhodopsin, the g-protein transducin is activated, which in turn activates what?
A. photosynthesis
B. hydrolysis
C. aldosterone
D. phosphodiesterase
Answer: | D | sciq |
In what stage of photosynthesis does the calvin cycle occur?
A. first
B. fourth
C. second
D. third
Answer: | C | sciq |
All of the planets rotate on their axes in the same direction that they move around the sun, except for which one?
A. venus
B. Jupiter
C. Saturn
D. uranus
Answer: | D | sciq |
What is the process by which organisms change in small ways over time?
A. microevolution
B. natural selection
C. adaptation
D. spontaneous mutation
Answer: | A | sciq |
What regulates the cell cycle only when they are tightly bound to cdks?
A. subclades
B. cyclins
C. hormones
D. kinases
Answer: | B | sciq |
Einstein developed a theory about how electromagnetic radiation can behave as both a wave and what else?
A. energy
B. sound
C. particle
D. bacteria
Answer: | C | sciq |
What type of proteins are only temporarily associated with the membrane?
A. peripheral membrane proteins
B. peripheral oxidation proteins
C. visual membrane proteins
D. sensitive rod proteins
Answer: | A | sciq |
Which organisms break down either organic or inorganic molecules to supply energy for the cell?
A. asexual organisms
B. spicule organisms
C. photoreactive organisms
D. chemotrophic organisms
Answer: | D | sciq |
What are the things moving under the earth's mantle that move the crust?
A. lava channels
B. plates
C. crystals
D. ridges
Answer: | B | sciq |
Although they look like big rocks, what structures that serve as habitats for many different types of ocean life are actually alive?
A. southern reefs
B. coral reefs
C. natural reefs
D. new forming reefs
Answer: | B | sciq |
What type of reactions are chemical reactions that release energy?
A. exothermic reactions
B. biochemical reactions
C. sulfuric reactions
D. ozonic reactions
Answer: | A | sciq |
Fossil fuels and coal are examples of what kind of resources?
A. nonrenewable
B. valuable
C. renewable
D. reusable
Answer: | A | sciq |
What type of compound contains atoms of two or more different elements in its ring structure?
A. polymer
B. aldehyde
C. heterocyclic
D. hydrocarbon
Answer: | C | sciq |
What is formed when atoms of different elements combine in a chemical reaction?
A. compounds
B. toxins
C. dust
D. crystals
Answer: | A | sciq |
What type of electricity is formed when a negative charge builds up and are transferred?
A. alternating current
B. static electricity
C. direct current
D. neutron energy
Answer: | B | sciq |
What important liquid is stored throughout the earth in the oceans, underground, and in ice?
A. air
B. lava
C. oil
D. water
Answer: | D | sciq |
What results when a warm air mass runs into a cold air mass?
A. rough front
B. dry front
C. cool front
D. warm front
Answer: | D | sciq |
Which type of double bond has a sigma bond and a pi bond?
A. carbon-oxygen bond
B. dioxide - oxygen bond
C. Covalent Bonds
D. sodium - oxygen bond
Answer: | A | sciq |
Has the average annual temperature on earth been rising or falling for the past 100 years?
A. fluctuating
B. unchanged
C. falling
D. rising
Answer: | D | sciq |
The majoirty of modern gymnosperms belong to what group, which includes pine trees?
A. clusters
B. Pinophytes
C. conifers
D. stems
Answer: | C | sciq |
A circuit must be what in order for electric devices such as light bulbs to work?
A. closed
B. cyclical
C. open
D. down
Answer: | A | sciq |
What type of radiation from the sun reaches earth across space striking everything on earth’s surface?
A. static
B. particle
C. seismic
D. electromagnetic
Answer: | D | sciq |
What happens if a catalyst runs out?
A. reaction slows
B. reaction increases
C. variety slows
D. variety increases
Answer: | A | sciq |
What type of mammals are humans?
A. respiratory mammals
B. somatic mammals
C. marsupial mammals
D. placental mammals
Answer: | D | sciq |
The shape of the path of an object undergoing projectile motion in two dimensions is a what?
A. orbit
B. radius
C. parabola
D. circle
Answer: | C | sciq |
The earliest cells were called what?
A. microcytes
B. eukaryotes
C. prokaryotes
D. carbohydrates
Answer: | C | sciq |
Protists are the simplest of what?
A. plants
B. eukaryotes
C. prokaryotes
D. fungi
Answer: | B | sciq |
The measure of magnetic fields is named after a serbian physicist. what is his name?
A. Niels Bohr
B. nikola tesla
C. Carl Sagan
D. Albert Einstein
Answer: | B | sciq |
Radon (rn) is a radioactive gas formed by the decay of naturally occurring uranium in rocks such as granite. it tends to collect in the basements of houses and poses a significant health risk if present in indoor air. many states now require that houses be tested for radon before they are what?
A. seen
B. built
C. modified
D. sold
Answer: | D | sciq |
What state of matter takes neither the shape nor the volume of its container?
A. solid
B. gas
C. hot
D. liquid
Answer: | A | sciq |
Force times distance is the equation for what?
A. speed
B. work
C. gravity
D. power
Answer: | B | sciq |
What is the name for a series of changes in the reproductive system of mature females that repeats every month on average?
A. periodic table
B. urinary cycle
C. menstrual cycle
D. puberty
Answer: | C | sciq |
What is the name of the iron-containing oxygen-transport protein in the red blood cells of all vertebrates?
A. plasma
B. hemoglobin
C. platelet
D. ferric acid
Answer: | B | sciq |
What is the active ingredient in household bleach?
A. iodine
B. oxygen
C. magnesium
D. chlorine
Answer: | D | sciq |
What are the membrane-bound organelles that are usually larger than vesicles and can have secretory, excretory, and storage functions?
A. vacuoles
B. nucleolus
C. ribosomes
D. tubules
Answer: | A | sciq |
What broad category of animals is primarily ectothermic and covered with scales that facilitate swimming?
A. armadillo
B. fish
C. deer
D. turtles
Answer: | B | sciq |
What has two chains of nucleotides, one more than rna?
A. fna
B. dna
C. mna
D. gna
Answer: | B | sciq |
The axon terminates on muscle fibers at the neuromuscular junction. acetylcholine is released at this specialized synapse, which causes the muscle action potential to begin, following a large potential known as an end plate potential. when the lower motor neuron excites the muscle fiber, it contracts. all of this occurs in a fraction of a second, but this story is the basis of how this functions?
A. cardiovascular system
B. nervous system
C. respiratory system
D. muscular system
Answer: | B | sciq |
Misconceptions about what theory contribute to the controversy that still surrounds this fundamental principle of biology?
A. darwin on evolution
B. theory of evolution
C. cycle of evolution
D. brain of evolution
Answer: | B | sciq |
What device is used to stop a current in a circuit?
A. a valve
B. a mirror
C. a switch
D. a signal
Answer: | C | sciq |
What oily substance prevents the hair and skin of living things from drying out?
A. sebum
B. pancreatic enzymes
C. progesterone
D. pus
Answer: | A | sciq |
What two types of communication do both humans and birds use primarily?
A. sensual and auditory
B. material and auditory
C. visual and auditory
D. interaction and auditory
Answer: | C | sciq |
Eggs are produced in what organs and, upon fertilization, develop in what other organ?
A. ovaries, uterus
B. uterus, vagina
C. cervix, ovaries
D. fallopian tubes, ovaries
Answer: | A | sciq |
The first line of defense includes mechanical, chemical, and which other barrier?
A. independent
B. physical
C. biological
D. surgical
Answer: | C | sciq |
What is another term for nearsightedness?
A. myopia
B. anemia
C. astigmatism
D. hypoxia
Answer: | A | sciq |
Because all animals require an external source of what, they are called heterotrophic?
A. food
B. energy
C. fuel
D. water
Answer: | A | sciq |
What causes blue litmus to turn red?
A. base
B. carbon
C. oxygen
D. acid
Answer: | D | sciq |
When fossil fuel is burned the chemical energy is converted into what?
A. thermal energy
B. natural energy
C. atmospheric energy
D. kinetic energy
Answer: | A | sciq |
What two activities are especially important when a number of local populations are linked, forming a metapopulation?
A. immigration and emigration
B. family reunions and emigration
C. flow and emigration
D. immigration and family reunions
Answer: | A | sciq |
What is the physical environment in which a species lives and to which it has adapted?
A. ecosystem
B. land mass
C. farmland
D. habitat
Answer: | D | sciq |
What kind of tests may detect substances associated with particular disorders?
A. genetic
B. electrical
C. biochemical
D. hormonal
Answer: | C | sciq |
Scientists think the solar system formed from a big cloud of gas and dust called what?
A. supernova
B. Oort cloud
C. nebula
D. comet
Answer: | C | sciq |
What are the largest phylum of the animal kingdom?
A. Pycnogonida
B. Crustacea
C. arthropods
D. Chelicerata
Answer: | C | sciq |
What is the name for a material that prevents the transfer of heat energy?
A. thermal insulator
B. structure insulator
C. physical insulator
D. thermal condenser
Answer: | A | sciq |
What is a rock exposed to if it's undergoing metamorphism?
A. humidity and pressure
B. gravity and precipitation
C. time and energy
D. heat and pressure
Answer: | D | sciq |
Water infiltrates the ground because soil and rock may have air spaces between the grains. these pores, or tiny holes, result in the rock's what?
A. energy
B. shine
C. sheen
D. porosity
Answer: | D | sciq |
Work is done only if a force is exerted in the direction of what?
A. north
B. gravity
C. wind
D. motion
Answer: | D | sciq |
What is the smallest independently functioning unit of a living organism?
A. proteins
B. molecule
C. atom
D. cell
Answer: | D | sciq |
All animals have specialized types of what basic structures, which can then do different jobs?
A. atoms
B. cells
C. muscles
D. proteins
Answer: | B | sciq |
What term describes the number of items in a given area or volume?
A. fraction
B. density
C. concentration
D. alkalinity
Answer: | C | sciq |
Birds are known for flying south in the winter to avoid what?
A. solar radiation
B. cold weather
C. hurricanes
D. rain
Answer: | B | sciq |
The root system is usually anchored by one main root developed from what?
A. nuclei radicle
B. sperm radicle
C. organisms radicle
D. embryonic radicle
Answer: | D | sciq |
What type of learning is done from past experiences and reasoning?
A. consequence learning
B. transformation learning
C. insight learning
D. rational learning
Answer: | C | sciq |
Where is the pituitary gland?
A. heart
B. lung
C. brain
D. thyroid
Answer: | C | sciq |
Which fungi eaten by people all over the world?
A. legumes
B. fruits
C. mushrooms
D. algae
Answer: | C | sciq |
The outermost layer of the leaf is the epidermis; it is present on both sides of the leaf and is called the upper and lower epidermis, respectively. botanists call the upper side the adaxial surface (or adaxis) and the lower side this?
A. posterior surface
B. abaxial surface (or abaxis)
C. dorsal surface
D. anterior surface
Answer: | B | sciq |
A small quake preceding a large quake is called what?
A. warning shock
B. aftershock
C. foreshock
D. preshock
Answer: | C | sciq |
What do winter storms develop from at higher latitudes?
A. temperatures
B. cyclones
C. humidity
D. clouds
Answer: | B | sciq |
What is the only substance on earth that is present in all three states of matter?
A. carbon
B. air
C. water
D. mercury
Answer: | C | sciq |
What is essential for forming new genes?
A. enough mutations
B. chromosome deversity
C. enough chromosomes
D. large mutations
Answer: | D | sciq |
What is fluid friction with air called?
A. gravity
B. air resistance
C. buoyancy
D. wind resistance
Answer: | B | sciq |
Plants produce their own sugars and other food molecules through what process?
A. glycolysis
B. spermatogenesis
C. photosynthesis
D. hydrogenesis
Answer: | C | sciq |
What do fission reactors use to slow down the neutrons?
A. control
B. moderator
C. brake
D. inertia
Answer: | B | sciq |
What term is used to describe an unusual sound coming from the heart that is caused by the turbulent flow of blood?
A. garble
B. whisper
C. music
D. murmur
Answer: | D | sciq |
Carbon atoms are bonded to as many hydrogen atoms as possible in what type of fatty acids?
A. unsaturated
B. saturated
C. super
D. oily
Answer: | B | sciq |
What kind of mouthparts do aphids have?
A. piercing-sucking mouthparts
B. sponging mouthparts
C. siphoning mouthparts
D. chewing mouthparts
Answer: | A | sciq |
Sounds, chemicals, and visual cues are examples of what between animals?
A. circulation
B. communication
C. migration
D. procreation
Answer: | B | sciq |
What is pressure times area equal to?
A. density
B. force
C. mass
D. volume
Answer: | B | sciq |
What part of the kangaroo helps it balance when it leaps as well as when it sits?
A. the spine
B. large feet
C. the tail
D. the pouch
Answer: | C | sciq |
What is the evolutionary history of a group of related organisms called?
A. superfamily
B. lineage
C. ancestry
D. phylogeny
Answer: | D | sciq |
What are specialized cells in the brain that monitor the concentration of solutes in the blood called?
A. ionconcentrate
B. osmoreceptors
C. sporozoans
D. staurikosaurus
Answer: | B | sciq |
Bones consist of four types of tissue, compact bone, spongy bone, bone marrow, and what?
A. plasma
B. epithelium
C. periosteum
D. collagen
Answer: | C | sciq |
During adolescence, what causes most of the changes associated with puberty?
A. testosterone
B. nicotine
C. estrogen
D. methane
Answer: | A | sciq |
What is essential for cellular respiration for all aerobic organisms?
A. water
B. nitrogen
C. oxygen
D. carbon
Answer: | C | sciq |
Breeding in birds occurs through an internal type of what process?
A. sedimentation
B. fertilization
C. stimulation
D. segmentation
Answer: | B | sciq |
In an endothermic reaction, what is absorbed by the reaction?
A. atoms
B. energy
C. food
D. fuel
Answer: | B | sciq |
What scientist and monk is best known for his experiments with pea plants?
A. gregor mendel
B. steiner mendel
C. aristotle
D. charles darwin
Answer: | A | sciq |
What are structures that protect the coast like barrier islands called?
A. breakwaters
B. dunes
C. domes
D. fortresses
Answer: | A | sciq |
What leads to multiple copies of a chromosomal region?
A. duplications (or amplifications )
B. subtractions
C. minimilizations
D. gene modification
Answer: | A | sciq |
The larger surface area of leaves allows them to capture more what?
A. chlorophyll
B. sunlight
C. molecules
D. pollen
Answer: | B | sciq |
What is connected to, and dependent on, the gametophyte?
A. the zygote
B. the sperm
C. the sporophyte
D. the chromosomes
Answer: | C | sciq |
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