Once species have formed, they keep their identity by
A. developmental differences.
B. genetic blocks.
C. isolating mechanisms.
D. somatic mutations.
E. structural modifications.
C. isolating mechanisms.
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What happens to the oxygen that is used in cellular respiration?
A. It is converted to carbon dioxide B. It is used to make glucose C. It is used to make Krebs cycle intermediates D. It is reduced to form water E. It is converted to acetyl-CoA
Vascular cambium is capable of producing:
A. primary xylem only. B. primary phloem only. C. secondary xylem only. D. secondary phloem only. E. secondary xylem and phloem.
If blood transports hormones throughout the body, how do they communicate with specific targets?
A. Special gateway valves in the blood vessels direct hormones to their target tissues. B. Special carrier proteins "walk" along microtubule tracts to deliver the hormones to their targets. C. Axonal pathfinding mediates the delivery of hormones to their specific targets. D. Only target tissues have receptors that allow them to receive the signal. Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about hormones? What other information is related to the question? Choose Answer Given what you now know, what information is most likely to produce the correct answer? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
In the breakdown of glucose, a phosphorylated
six-carbon compound is split into two threecarbon compounds, which are named a. PGAL. b. pyruvate. c. acetyl-CoA. d. lactate. e. acetaldehyde.