In humans, straight thumbs are caused by the dominant allele T, while individuals who are tt have thumbs that curve backward ("hitchhiker's thumb")
Consider a family in which the father has straight thumbs, and both the mother and their only child have curved thumbs. What is the chance that their next child will have curved thumbs? A) 25%
B) 50%
C) 75%
D) 100%
B
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The enzyme lipoprotein lipase ____
a. decreases in concentration with exercise b. allows muscles to releases fatty acids c. decrease the risk of cardiovascular disease d. results in lower levels of HDL e. has no overall impact on health
Four of the five choices listed below are true for
gibberellin. Select the exception. a. breaks dormancy in buds b. first isolated from a fungus c. causes stem elongation d. triggers flower production e. overcomes genetic dwarfing
Air pollution does all of the following EXCEPT
a. eats away at marble. b. corrodes metals. c. causes various human diseases. d. damages crops. e. aid in resource development.
Which of the following will not prevent the further buildup of greenhouse gases?
a. Plant a tree or, better yet, plant many trees. b. Use your automobile less, and ride a bicycle more. c. Produce less waste that goes to landfills. d. Buy an air conditioner that uses chlorofluorocarbons. e. Buy an automobile that is more fuel-efficient.