One consequence of genetic drift is:
a. increasing heterozygosity in the population.
b. the maintenance of multiple alleles across long periods of time.
c. populations diverge in terms of their allele frequencies.
d. populations maintain the same set of alleles through time.
e. All of the above.
C
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Angiosperm tracheids move water more rapidly from roots to shoots than gymnosperm tracheids
Indicate whether the statement is true or false.
Asexually reproduced daughter cells are
a. identical to each other. b. identical to the parent cell. c. different from the parent cell. d. different from each other. e. identical to each other and to the parent cell
Which of the following is an example of a subunit vaccine?
A) The surface protein of a virus is used to make the vaccine. B) The virus is exposed to ultraviolet light. C) The virus is exposed to formaldehyde. D) The virus is grown in a host other than humans and thus grows more slowly than normal.
Photographs of cells from onion root tips are often used to show chromosomes primarily because these cells are:
A. diploid. B. rapidly undergoing mitosis. C. rapidly undergoing meiosis. D. in stationary phase. E. lacking organelles.