Which one of the following statements about horizontal gene transfer is false?
A. Horizontal gene transfer is also called lateral gene transfer.
B. Horizontal gene transfer involves hitchhiking genes from other species.
C. Horizontal gene transfer was common early in life, but is absent today.
D. Gene swapping is evident in the human genome.
E. The products of horizontal gene transfer often exist as transposons.
C. Horizontal gene transfer was common early in life, but is absent today.
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Consider the cladogram shown. Based on this cladogram, which species has the greatest number of ancestral character states?
A. 1
B. 2
C. 3
D. 4
E. 5
Clarify Question
· What is the key concept addressed by the question?
· What type of thinking is required?
· What key words does the question contain and what do they mean?
Gather Content
· What do you already know about cladistics?
Consider Possibilities
· What other information is related to the question? Which information is most useful?
Choose Answer
· Given what you now know, what information and/or problem solving approach 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?
What are the parts of the enzyme molecule that interact with a substrate called?
a. cofactors b. active sites c. reaction sites d. enzyme product sites e. enzyme-substrate complexes
Food allergies are a form of __________ hypersensitivity
A. Type IV B. Type III C. Type II D. secondary E. Type I
A nerve impulse is initiated when
A. a reversal in the polarized state of the cell causes it to reach action potential. B. voltage-gated channels close. C. physical disruption of the cell membrane causes some of its contents, including ions, to leak out. D. the Schwann cells move into their new position.