What evolutionary model for the maintenance of sexual reproduction do the following data appear to support?

a. Muller's ratchet
b. the red queen hypothesis
c. the Fisher–Muller hypothesis
d. the environmental unpredictability hypothesis


B

Biology & Microbiology

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Crossing over is limited to a single occurrence for a chromosome

Indicate whether the statement is true or false.

Biology & Microbiology

If you mutate the gene encoding a Cdk such that Cdk protein product cannot bind to cyclin, what effect would you expect to see?

A) Cdk will be unaffected. B) The cell cycle will be up-regulated, and the cells will proliferate. C) Cdk will be inactive, so the target proteins will not be phosphorylated. D) Cdk will be constitutively active, so the cell cycle will be unchecked. E) Cdk will phosphorylate its target proteins regardless of the cell cycle.

Biology & Microbiology

Which sense is a special sense?

A) temperature B) pain C) touch D) taste

Biology & Microbiology

If a person turns their ankle, how would one determine if damage to the tissue in the ankle has occurred?

a. The ankle is red. b. The ankle is red, swollen, and warm to the touch. c. The ankle is very warm to the touch. d. The ankle swells.

Biology & Microbiology