Chemistry, 24.09.2019 19:30 autumnplunkett09
In an experiment, onion plants of different ages were exposed to various amounts of caffeine to determine the effect of caffeine on cell growth. temperature, amount of water, and light were kept constant. which of these statements about the experiment is definitely true?
a. the results may not be valid because there were two variables.
b. the amount of caffeine used was a control.
c. temperature, water, and light were the only variables.
d. onion plants can be used to model the effects of caffeine on living things.
Answers: 1
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In an investigation that uses the scientific method, which step immediately follows making a hypothesis? o summarizing the results o asking a question o making observations designing an experiment mark this and retum save and exit next submit
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Which set of characteristics best describes igneous rock? a) largest type of rock, made of organic matter, hardest type of rock b) least abundant type of rock, made of other rocks, made mostly of minerals c) found on all continents, contains wavy bands of stripes, contains fossils d) most abundant type in earth's crust, made of magma/lava, contains no fossils
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Anthracite is so hard and pure it is also referred to as a renewable resource metamorphic rock hot bituminous coal dirty fuel
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In an experiment, onion plants of different ages were exposed to various amounts of caffeine to dete...
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