African sleeping sickness is caused by
A. Trypanosoma brucei.
B. Trypanosoma cruzi.
C. Isospora belli.
D. Plasmodium falciparum.
E. Leishmania brasiliensis.
Answer: A
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The process of human X-chromosome inactivation in female cells:
A. is more common for the paternal X chromosome than the maternal X chromosome. B. condenses one copy of the X chromosome into heterochromatin. C. is necessary to ensure that only Y chromosome genes are expressed in some cells. D. All of the choices are correct.
Which of Lamarck's ideas was the least influential to Darwin’s evolutionary theory?
a. Species change through time. b. New characteristics are passed from one generation to the next. c. Organisms change in response to their environment. d. Acquired characteristics are passed on from parents to offspring. e. Specific mechanisms exist that foster evolutionary change.
The food of most baleen whales consists of:
a. benthic invertebrates. b. nektonic fishes. c. algae. d. plankton. e. detritus.
Allele pairs are most likely to assort independently of one another when
A. they are sex-linked. B. they control related traits. C. they are on different chromosomes. D. they control unrelated traits. E. they are on the same chromosome.