4. Read the following sentence from the section "Are All Enzymes Proteins?"
Most of the time students study enzymes, they are really studying protein-based
enzymes, since very little is known about how RNA can act as a catalyst.
The author uses the word "catalyst" to mean...
A. someone whose enthusiasm causes others to be more energetic
B. something that generates activity between two or more people
C. a person who launches an event or change
D. a substance that causes or speeds up a chemical reaction
Answers: 2
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This aquarium exhibits biotic and abiotic factors in an aquatic environment. one of the abiotic factors is
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Which of these serves as a reference for comparison during a scientific investigation? a)outcome variable (dependent variable) b) test variable (independent variable) c)control group d)hypothesis
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Photosynthesis uses co2 and cellular respiration produces co2. we call the point when the two processes are in balance--when there is no net production of co2--the compensation point. how might you limit one of the processes in order to achieve a compensation point?
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Astudent wants to test the hypothesis that fertilizer improves the growth rate of grass seeds. to test this hypothesis, the student put the same amount of grass seed in 3 containers with the same type of soil. the student measured the growth at the end of the week. all plants received equal amounts of water and sunlight. if you were asked to graph this data, what would you place on the x-axis? a. fertilizer b. water c. plant growth d. week one
Answers: 1
4. Read the following sentence from the section "Are All Enzymes Proteins?"
Most of the time studen...
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