Conservation of global biodiversity is best served by directing efforts toward areas of:
A) high diversity.
B) high endemism.
C) both A and B.
Ans: C) both A and B.
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When Thomas Hunt Morgan began studying white-eyed fruit flies, the first observation he made that departed from the results he expected based on Mendelian principles was that:
A. the offspring of a white-eyed male and wildtype (red-eyed) female all had red eyes. B. white eyes reappeared in his second generation crosses (matings between brothers and sisters produced from the first cross). C. white eyes appeared only in males. D. white eyes appeared only in females. E. white eyes appeared in both males and females.
All perennials have secondary tissues
Indicate whether the statement is true or false.
Which of the following choices is a proximate cause of the non-combative behavior of male African
cichlids that do not hold territories?
a. Cichlids can detect and store information about aggressive encounters. b. The GnRH-producing neurons in the hypothalamus are small. c. The testes produce no testosterone. d. GnRH production is high. e. Noncombative behavior allows the male to build his strength for a takeover attempt on a territory.
Meiosis and cytokinesis result in the formation of ________.
A. four haploid cells B. two diploid cells C. four diploid cells D. two haploid cells