During genetic drift the gene frequencies of a population will change ________

a. back and forth and eventually stabilize
b. in a random direction based upon chance
c. in a random direction based upon the predators faced by the population
d. in a predictable direction based upon the number of females in the population
e. in a predictable direction based upon the number of males in the population


b

Biology & Microbiology

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When atmospheric CO2 concentrations decrease, the ________ cycle gives C4 plants an advantage over C3 in carbon fixation

Fill in the blank with correct word.

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Synaptonemal complex forms during

A) leptonema. B) zygonema. C) pachynema. D) diplonema. E) diakinesis.

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Which of the following techniques would be most appropriate to test the hypothesis that humans and chimps differ in the expression of a large set of shared genes?

A) DNA microarray analysis B) polymerase chain reactin (PCR) C) DNA sequencing D) protein-protein interaction assays

Biology & Microbiology

The __________ is the outermost extraembryonic membrane of the amniotic egg.

a. chorion b. allantois c. amnion d. yolk sac e. shell

Biology & Microbiology