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481 values
sciq-3731
multiple_choice
What speeds up chemical reactions inside cells?
[ "catalysts", "inhibitors", "electrodes", "nucleus" ]
A
sciq-10046
multiple_choice
Van der waals forces are weak interactions between molecules that involve what?
[ "photons", "atoms", "dipoles", "particles" ]
C
ai2_arc-202
multiple_choice
An increase in phosphate levels in a lake increases the population of algae in the lake. Increased algae blocks sunlight into the lake and results in a decrease in dissolved oxygen in the lake's water. Which of the following should be expected as a result?
[ "Plant populations in the lake increase.", "More predatory birds feed on lake animals.", "Phosphate levels in the lake decrease.", "Fish populations in the lake decline." ]
D
sciq-9208
multiple_choice
What anatomical system is made up of neurons and glia?
[ "nervous system", "reproductive system", "digestive system", "lymphatic system" ]
A
sciq-1339
multiple_choice
What does the ground tissue consist mostly of in the stems of both monocots and eudicots?
[ "parenchyma cells", "hinterrhein cells", "epenthesis cells", "eudiocotic cells" ]
A
ai2_arc-170
multiple_choice
Cell membranes are described as selectively permeable. Four students were asked to explain what this means and provided the answers given below.Student 1: Cell membranes prevent all materials from entering the cell.Student 2: Cell membranes only provide structural support for the cell.Student 3: Cell membranes regulate which substances can enter and exit the cell.Student 4: Cell membranes allow water and water-soluble substances to enter the cell.Which student correctly identified the function of the selectively permeable membrane?
[ "Student 1", "Student 2", "Student 3", "Student 4" ]
C
sciq-283
multiple_choice
Ringworm and athlete's foot are human diseases caused by what simple organisms?
[ "bacteria", "fungi", "insects", "viruses" ]
B
sciq-8772
multiple_choice
What is a waste product from fossil fuel burning?
[ "oxidation", "co2 emissions", "smog", "hydrogen gas" ]
B
sciq-7528
multiple_choice
What is anything that causes cancer called?
[ "bacteria", "carcinogen", "pesticide", "chemical" ]
B
sciq-10122
multiple_choice
Animals that are endotherms or ectotherms are distinguished by the ability to maintain a constant what?
[ "bearing temperature", "step temperature", "Moving Tempature", "body temperature" ]
D
sciq-9402
multiple_choice
What scientist constructed a tree diagram, separating living organisms into three domains?
[ "CT Fletcher", "Mendel", "Gibbs", "carl woese" ]
D
sciq-7648
multiple_choice
Osmosis is driven by the imbalance of what?
[ "water concentration", "precipitation", "evaporation", "isolation" ]
A
sciq-2955
multiple_choice
Fungi are unique in having cell walls made of what?
[ "prokaryotic", "chitin", "Protein", "lectin" ]
B
sciq-11155
multiple_choice
Hypoxia is a condition of the reduced supply of what?
[ "oxygen", "methane", "food", "nitrogen" ]
A
sciq-1436
multiple_choice
Glucose, galactose, and fructose are all what?
[ "alucoxes", "hexoses", "structoxes", "fluxes" ]
B
sciq-8928
multiple_choice
The changing of a light ray’s direction (loosely called bending) when it passes through variations in matter is called this?
[ "resonance", "wavelength", "vibration", "refraction" ]
D
sciq-503
multiple_choice
What force is responsible for erosion by flowing water and glaciers?
[ "weight", "kinetic", "gravity", "electromagnetic" ]
C
sciq-7684
multiple_choice
When do end portions of two nonsister chromatids trade places?
[ "at night", "at every crossover", "never", "during respiration" ]
B
sciq-454
multiple_choice
When we consider a chemical reaction, we need to take into account both the system and what?
[ "sorroundings", "time", "date", "fluctuations" ]
A
sciq-9697
multiple_choice
What are all scientific explanations and interpretations based on?
[ "controls", "changes", "facts", "theories" ]
C
sciq-8183
multiple_choice
What is the star-like structure inside the paramecia?
[ "the reflex vacuole", "the baré vacuole", "the elongated vacuole", "the contractile vacuole" ]
D
sciq-608
multiple_choice
What is the network of vessels and tissues that carry a clear fluid called lymph called?
[ "vessel system", "excretory system", "lymphatic system", "cleansing system" ]
C
sciq-6260
multiple_choice
Eggs are produced in what organs and, upon fertilization, develop in what other organ?
[ "cervix, ovaries", "ovaries, uterus", "uterus, vagina", "fallopian tubes, ovaries" ]
B
scienceQA-10895
multiple_choice
Select the amphibian.
[ "olive toad", "emu", "rabbit", "anchovy" ]
A
An anchovy is a fish. It lives underwater. It has fins, not limbs. An anchovy is a small fish that lives in the ocean. Like some other types of fish, anchovies swim in large groups called schools. A rabbit is a mammal. It has fur and feeds its young milk. Rabbits live underground in burrows. A group of rabbit burrows is called a warren. An olive toad is an amphibian. It has moist skin and begins its life in water. Toads do not have teeth! They swallow their food whole. An emu is a bird. It has feathers, two wings, and a beak. Emus cannot fly, but they can run very fast. They run to avoid predators.
sciq-7686
multiple_choice
Magma can be created when temperature rises, pressure lowers, or what else is added?
[ "dirt", "air", "sand", "water" ]
D
ai2_arc-818
multiple_choice
A new organism is discovered. It is multicellular, autotrophic, and does not move on its own. In which kingdoms could the organism belong?
[ "Fungi and Plants", "Protists and Plants", "Animals and Fungi", "Protists and Animals" ]
B
sciq-4788
multiple_choice
What type of gas is delivered to homes to use for cooking and heating?
[ "nuetralized gas", "compounded gas", "fluid gas", "natural gas" ]
D
sciq-9802
multiple_choice
Explanations of some aspect of the natural world based on repeated observations are termed what?
[ "scientific guesses", "scientific thoughts", "scientific insights", "scientific theories" ]
D
sciq-10379
multiple_choice
What are the names of foul-smelling amines, formed as a part of the decay process after death?
[ "cadaverine and putrescine", "formaldehyde and cadaverine", "sulfur and formaldehyde", "methane and sulfur" ]
A
sciq-1532
multiple_choice
A complex interactions of hormones result in an edible fruit that entices animals that help disperse what?
[ "rocks", "pests", "water", "seeds" ]
D
sciq-4842
multiple_choice
Like the energy content in food, the energy expenditures of exercise are also reported in what units?
[ "grams", "ironies", "kilocalories", "gigabytes" ]
C
sciq-3829
multiple_choice
What is a mutation that changes all or much of a particular chromosome?
[ "chromosomal mutation", "muscular mutation", "biochemical mutation", "kinetic mutation" ]
A
sciq-8497
multiple_choice
Microwave ovens use radiation to provide food with what kind of energy?
[ "mechanical", "magnetic", "heat", "vibrational" ]
C
ai2_arc-437
multiple_choice
Approximately 59% of the Moon is visible from Earth because the Moon rotates and revolves in the same period. Which most likely causes this phenomenon?
[ "the gravitational pull of the Sun", "the gravitational pull of Earth", "the composition of the Moon", "the phases of the Moon" ]
B
sciq-364
multiple_choice
What process is at work when warm air or water rises, and cool air or water sinks?
[ "radiation", "moisture", "evaporation", "convection" ]
D
sciq-4479
multiple_choice
Viruses were assumed to exist before they were first seen with an electron microscope in which decade?
[ "1960's", "1940's", "1890's", "1930 ' s" ]
D
sciq-2843
multiple_choice
Because opposite charges attract, oppositely charged ions attract each other to form what?
[ "ionic bonds", "nuclear bonds", "particle bonds", "soluble bonds" ]
A
sciq-7353
multiple_choice
Sickle-cell anemia, leukemia, lymphoma, and hemophilia are examples of what types of disease?
[ "Cancer", "blood disease", "Bone Diease", "microscopic disease" ]
B
sciq-5870
multiple_choice
The diversity of alleles and genotypes within a population is known as genetic what?
[ "variable", "variance", "density", "group" ]
B
sciq-4511
multiple_choice
Chloroplasts are the little green particles in plants made up of what colorful pigment?
[ "chlorophyll", "carbonate", "verdigris", "melanin" ]
A
sciq-620
multiple_choice
How many mass distinctions have radically altered the history of life?
[ "one", "four", "six", "five" ]
D
sciq-9584
multiple_choice
If a fixed amount of gas maintains a perfectly inversely proportional relationship between volume and pressure, then what else must be constant about the gas?
[ "surface tension", "friction", "temperature", "density" ]
C
sciq-6463
multiple_choice
What are the two basic types of competition called?
[ "instraspecifc and interspecific", "exploitative and beneficial", "interference and interaction", "weak and strong" ]
A
sciq-2020
multiple_choice
What nullified the idea that all biological catalysts are proteins?
[ "discovery of enzymes", "amino acid theory", "discovery of metabolites", "discovery of ribozymes" ]
D
sciq-1341
multiple_choice
What catalyzes the hydrolysis of amino acids from the n-terminal end of a protein?
[ "synthase", "testosterone", "aminopeptidase", "nucleic acid" ]
C
sciq-287
multiple_choice
The creation and destruction of oceanic crust is the reason what moves?
[ "animals", "planets", "oceans", "continents" ]
D
scienceQA-7849
multiple_choice
Select the vertebrate.
[ "opossum", "bess beetle", "rock lobster", "fireworm" ]
A
A bess beetle is an insect. Like other insects, a bess beetle is an invertebrate. It does not have a backbone. It has an exoskeleton. A rock lobster is a crustacean. Like other crustaceans, a rock lobster is an invertebrate. It does not have a backbone. It has an exoskeleton. An opossum is a mammal. Like other mammals, an opossum is a vertebrate. It has a backbone. A fireworm is a worm. Like other worms, a fireworm is an invertebrate. It does not have a backbone. It has a soft body.
sciq-2183
multiple_choice
Atoms with the same atomic number but different mass numbers are called what?
[ "reactions", "tropes", "organisms", "isotopes" ]
D
sciq-1951
multiple_choice
Atoms are composed of negatively charged electrons and a positively charged what?
[ "nucleus", "DNA segment", "bond", "neutron" ]
A
sciq-6015
multiple_choice
What substance is removed from waste as it passes through the large intestine?
[ "blood", "nutrients", "water", "air" ]
C
sciq-7796
multiple_choice
What type of winds move the same way as mountain and valley breezes?
[ "planetary winds", "katabatic winds", "prevailing winds", "pyroclastic winds" ]
B
sciq-585
multiple_choice
Sepals, petals, stamens, and carpels are what kind of organs?
[ "animal", "reproductive", "marine", "floral" ]
D
sciq-7193
multiple_choice
How high or low a sound seems is associated with what property of the sound?
[ "wavelength", "frequency", "pitch", "decibel" ]
C
sciq-5321
multiple_choice
Insulin and glucagon help keep blood glucose levels in the normal range because of what type of effects?
[ "opportunistic", "sympathetic", "ABNORMALISTIC", "antagonistic" ]
D
sciq-10239
multiple_choice
What type of fertilization usually occurs in aquatic environments where both eggs and sperm are released into the water?
[ "material", "static", "external", "Internal" ]
C
ai2_arc-277
multiple_choice
Some health care professionals recommend that children use insect repellent before going outside. Using insect repellent is a good way to keep the insects from
[ "reproducing.", "laying eggs.", "spreading disease.", "dying." ]
C
sciq-11084
multiple_choice
The right atrium receives all of the systemic venous return. most of the blood flows into either the superior vena cava or this?
[ "identical vena cava", "resulted vena cava", "exterior vena cava", "inferior vena cava" ]
D
sciq-6517
multiple_choice
What is the term for liquid waste formed by kidneys?
[ "sperm", "urine", "blood", "feces" ]
B
sciq-9787
multiple_choice
Often determining the strength or intensity of a wave, this term is the distance from the equilibrium point of motion to either its lowest or highest point?
[ "amplitude", "peak", "density", "frequency" ]
A
sciq-9652
multiple_choice
Energy constantly changes back and forth between kinetic and what type of energy?
[ "mechanical", "potential", "practical", "physical" ]
B
ai2_arc-558
multiple_choice
Many scientists think that burning fossil fuels has increased the amount of carbon dioxide in the atmosphere. What effect would the increase of carbon dioxide most likely have on the planet?
[ "a cooler climate", "a warmer climate", "lower relative humidity", "more ozone in the atmosphere" ]
B
sciq-10381
multiple_choice
What are the smallest particles of water called?
[ "hydrogen", "ions", "atoms", "molecules" ]
D
sciq-5843
multiple_choice
When drinking water is treated, what is the term for when chemicals cause solids in the water to clump together?
[ "coagulation", "clumping", "plasma", "oxidation" ]
A
sciq-10813
multiple_choice
Which organ breaks down amino acids and toxins that are in the blood?
[ "kidney", "liver", "small intestine", "skin" ]
B
sciq-4519
multiple_choice
Explosive eruptions associated with what can be tens of thousands of times as powerful as an atomic bomb?
[ "forest fires", "hurricanes", "earthquakes", "volcanoes" ]
D
sciq-7710
multiple_choice
What type of constraints are placed on technological design?
[ "physical and social", "moral and legal", "physical and legal", "legal and social" ]
A
sciq-6051
multiple_choice
A standing wave is created when what type of wave interferes with the original wave?
[ "realized wave", "reflected wave", "refracted wave", "translated wave" ]
B
sciq-8769
multiple_choice
What explains why water molecules tend to stick together?
[ "covalent bonds", "mineral bonds", "hydrogen bonds", "helium bonds" ]
C
sciq-8224
multiple_choice
Continental climates are generally found in what areas of landmasses?
[ "northerly", "buttes", "inland", "wetlands" ]
C
sciq-8068
multiple_choice
In dioecious animals, females generally produce what contribution to reproduction?
[ "eggs", "milk", "intelligence", "warmth" ]
A
sciq-640
multiple_choice
Sympathetic stimulation also triggers the release of epinephrine and norepinephrine, which enhance both cardiac output and what else?
[ "vasodilation", "inhibition", "vasoconstriction", "digestion" ]
C
sciq-10279
multiple_choice
An allele is an alternative form of what structure?
[ "gene", "protein", "amino acid", "enzyme" ]
A
sciq-6831
multiple_choice
A homogeneous mixture with tiny particles in it is known as what?
[ "element", "solution", "structure", "plasmid" ]
B
sciq-4694
multiple_choice
What is the scientific term for stored energy an object has due to its position or shape?
[ "mechanical energy", "repeat energy", "new energy", "potential energy" ]
D
sciq-4216
multiple_choice
What branch of science is the study of the solid earth?
[ "biology", "ecology", "palentology", "geology" ]
D
sciq-10788
multiple_choice
One crystalline form of calcium carbonate is the mineral sold as what?
[ "basalt", "quartz", "calcite", "salt" ]
C
sciq-1098
multiple_choice
What affects how high a cake rises when it bakes?
[ "current pressure", "air currents", "air pressure", "air movement" ]
C
sciq-6572
multiple_choice
Lymph capillaries collect fluid that leaks out of what?
[ "blood capillaries", "alveoli", "bladder", "lymph nodes" ]
A
sciq-8631
multiple_choice
What act like filters and remove pathogens from lymph?
[ "tissue nodes", "electric nodes", "lymph nodes", "spine nodes" ]
C
sciq-4315
multiple_choice
Alternative current is produced when a magnet or coil does what?
[ "moves in circles at faster rates", "moves back and forth repeatedly", "moves at faster velocities", "moves up and down repeatedly" ]
B
sciq-10777
multiple_choice
Layers of placental transfer cells help transport nutrients to the embryos as they develop into what?
[ "kinesins", "sporophytes", "fibroblasts", "keratinocytes" ]
B
ai2_arc-144
multiple_choice
Scientists know that Earth is constantly changing. They are familiar with the processes that are repeated daily, monthly, and yearly. Which of these is a natural event that can be predicted to occur monthly?
[ "volcanic eruptions", "earthquake activity", "phases of the moon", "precipitation amounts" ]
C
sciq-3385
multiple_choice
How many alleles comes from each parent?
[ "two", "three", "one", "none" ]
C
sciq-11094
multiple_choice
What is the term for rotation of a bone toward the midline of the body?
[ "visual rotation", "lateral rotation", "medial rotation", "interior rotation" ]
C
sciq-4783
multiple_choice
Sudden changes in geologic and climatic conditions can spur what process?
[ "evolution", "generation", "symbiosis", "cloning" ]
A
sciq-6200
multiple_choice
The nitrogen that enters living systems by nitrogen fixation is successively converted from organic nitrogen back into nitrogen gas by what?
[ "pollen", "bacteria", "viruses", "algae" ]
B
sciq-9175
multiple_choice
The planets orbit around what celestial body?
[ "sun", "moon", "horizon", "earth" ]
A
sciq-3432
multiple_choice
What is the turning effectiveness of a force?
[ "velocity", "intake", "torque", "gravitational pull" ]
C
sciq-7390
multiple_choice
Where does the process of assembling amino acids into a protein take place?
[ "in chromosomes", "in the chitin", "in the ribosome", "in the nucleus" ]
C
sciq-4643
multiple_choice
Forces which cause objects to turn around continuously in a circle are known as?
[ "hydrodynamic forces", "centripetal forces", "tension forces", "frictional forces" ]
B
scienceQA-4501
multiple_choice
Select the amphibian.
[ "red-eyed tree frog", "eagle ray", "red kangaroo", "Mojave rattlesnake" ]
A
A red-eyed tree frog is an amphibian. It has moist skin and begins its life in water. A red-eyed tree frog has sticky pads on its toes. The sticky pads help the red-eyed tree frog hold on to leaves. An eagle ray is a fish. It lives underwater. It has fins, not limbs. Rays have a different shape than many other fish. Rays are large and flat. They have wide, triangle-shaped fins that help them swim long distances. A red kangaroo is a mammal. It has fur and feeds its young milk. Kangaroos hop to move around. They use their large tails for balance while hopping. A Mojave rattlesnake is a reptile. It has scaly, waterproof skin. Rattlesnakes have fangs they can use to inject venom into their prey.
sciq-7981
multiple_choice
When light strikes the rods and cones, they hyperpolarize, shutting off their release of what?
[ "glutamate", "enzyme", "dopamine", "vitreous fluid" ]
A
sciq-3198
multiple_choice
What living things are considered photoautotrophs because they use sunlight and carbon from carbon dioxide to synthesize chemical energy in the form of carbohydrates?
[ "moulds", "plants", "protazoa", "bacteria" ]
B
ai2_arc-340
multiple_choice
Which is true about reproduction for both an amoeba and a paramecium?
[ "Both can conjugate.", "Neither can conjugate.", "An amoeba can conjugate, but a paramecium cannot.", "A paramecium can conjugate, but an amoeba cannot." ]
D
sciq-2674
multiple_choice
Photoautotrophs use what energy source to self-manufacture their own food?
[ "light", "water", "air", "chlorophyll" ]
A
sciq-5009
multiple_choice
A hydraulic jack that makes it possible to lift a car easily is an example of what, meaning it produces mechanical advantages?
[ "complex machines", "simple machine", "simple weapon", "quantum physics" ]
B
sciq-3390
multiple_choice
Frogs and toads, salamanders and newts, and caecilians are the three orders of what group of animals?
[ "amphibians", "marsupials", "reptiles", "mammals" ]
A
ai2_arc-862
multiple_choice
One 7.0 kg bowling ball is lifted to a storage shelf 1.0 m above the floor. A second 7.0 kg ball is lifted to a storage shelf 2.0 m above the floor. Which of the following best explains why the measured force of gravity on each ball is nearly identical?
[ "The final potential energy of each ball increased.", "The amount of work required to lift each ball is identical.", "The distance of each ball from Earth's center of mass is almost identical.", "The gravitational force of each ball on the other cancels out the force of Earth's gravity." ]
C
sciq-10819
multiple_choice
Which glands sit atop the kidneys and are composed of an outer cortex and an inner medulla, all surrounded by a connective tissue capsule?
[ "gonads", "thyroid glands", "adrenal", "salivary" ]
C
sciq-8655
multiple_choice
What part of the brain controls body position, coordination, and balance?
[ "right brain", "cerebellum", "cerebrum", "brain stem" ]
B