The production of estrogen and progesterone decreases during menopause. This can cause thinning of bones and brief moments of feeling hot. What is another biological effect of low amounts of these hormones in women?
A) inability to maintain normal nerve cell development
B) inability to reproduce successfully
C) becoming anemic
D) joint swelling
Answer: B
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A modified form of cellulose found in the exoskeletons of insects and crustaceans is known as:
A. chitin B. starch C. amylose D. glycogen
The "one-gene/one-enzyme" hypothesis was proposed by
A. Watson and Crick. B. Griffith. C. Garrod. D. Franklin. E. Beadle and Tatum.
The wide variety of finches Darwin observed in the Galàpagos was thought provoking to him because they appeared to have descended from __________ population. Today we regard this as an example of ___________
A. the same; adaptive radiation B. more than one; convergent evolution C. the same; convergent evolution D. more than one; adaptive radiation
Which of the following has not been shown to slow down the signs of aging in humans?
A) protecting the skin from sun exposure B) eating a very low-calorie diet C) regular exercise D) All have been found to be beneficial to humans.