Tobacco smokers (and those exposed to tobacco smoke) are at greater risk of an ectopic (tubal) pregnancy. Based on your understanding of the structures of the cytoskeleton, what is the BEST explanation?
A) Tobacco interferes with the microtubule network of eggs thus weakening their structure.
B) Tobacco interferes with the functioning of the flagella propelling sperm.
C) Tobacco interferes with microfilament formation in sperm, thereby forcing the zygote to implant in a fallopian tube.
D) Tobacco interferes with the sweeping motion of cilia that aids in the movement of the egg toward the uterus.
D
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An hypothesis currently getting a lot of attention
concerning the origin of biological molecules is that they originated a. in hot springs. b. near volcanoes. c. near hydrothermal oceanic vents. d. in salt lakes. e. in tidal pools.
Which of the following terms is NOT related to the other four?
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What will be an ideal response?