Meiosis results in sperm formation in males. The critical meiotic step(s) that will ensure proper chromosome number in the resulting offspring is (are) ___.
A. the separation of sister chromatids
B. fertilization of the egg
C. the separation of homologous chromosomes
D. both a and c
Ans: D. both a and c
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Leslie has a severe sore throat and the lymph nodes in her neck are swollen. This would indicate that
A) the focus of the infection is the lymph nodes. B) lymph is not flowing consistently through these lymph nodes. C) the lymph nodes contain an increased number of lymphocytes. D) the lymph nodes are actively producing phagocytes. E) the lymph nodes have increased their secretion of thymosin.
Stimulation of the aortic baroreceptors reflexively results in
A) stimulation of the cardioaccelerator center in the brain. B) increased sympathetic stimulation of the heart. C) increased activity by the parasympathetic nervous system. D) stimulation of the vasoconstrictive center. E) increased heart rate.
The ________ are finger-like projections at the end of the uterine tube.
A) internal os B) isthmus C) infundibulum D) fimbriae E) uterine glands
A defining characteristic of a(n) _____ test is the active involvement of a test administrator.
A. individual B. power C. group D. speed