If there are 32 sister chromatids in a normal somatic cell, how many chromosomes are there?
A. 32
B. 64
C. 16
D. 8
Answer: C
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Which of the following lists the structures of the male reproductive tract in the proper order from sperm production to ejaculation?
A. vas deferens, epididymis, seminiferous tubules, ejaculatory duct, urethra B. seminal vesicles, vas deferens, prostate, urethra, ejaculatory duct C. seminiferous tubules, epididymis, vas deferens, ejaculatory duct, urethra D. vas deferens, epididymis, seminal vesicles, ejaculatory duct, urethra E. epididymis, seminiferous tubules, ejaculatory duct, vas deferens, urethra
Which of the following produces a highly resistant spore containing a polar tubule?
A. Microsporidia B. Cyclosporans C. Pneumocystis D. Trypanosoma cruzi
Although bees carry pollen from tulip flowers to the blossoms on cherry trees, hybrid seeds are not produced because of
A) gametic isolation. B) temporal isolation. C) ecological isolation. D) mechanical isolation. E) All of these
What is the advantage of a closed circulatory system over an open one?
A) A closed system carries more blood. B) In a closed system, the blood comes nearer to each cell. C) Blood flows more slowly in a closed system. D) There are more blood cells in a closed system. E) A closed system moves blood more efficiently.