A species is composed of
a. related organisms.
b. a group of reproductive females.
c. populations that have the potential to interbreed and produce fertile offspring.
d. organisms located in the same habitat.
e. all males and females in the same geographical range with the same ecological
requirements.
C
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Which of the following is NOT normally considered
a temporary method of contraception? a. birth-control pills b. vasectomy c. condoms d. IUD plus spermicide e. spermicidal jelly or foam
Which of the following is not a characteristic of meiotic cell division?
A. Cell division results in the production of gametes. B. Daughter cells are genetically identical. C. Cell division results in the formation of four daughter cells. D. Cell division requires two rounds of nuclear division.
What gene is most responsible for X-inactivation?
A. Xic B. Xist C. Tsix D. Xce
The community effect of oil pollution is
a. increased biomass. b. reduced diversity. c. longer food chains. d. increased trophic complexity. e. greater stability.