Most of the active functions of plasma
membranes are carried out by
a. cholesterol.
b. proteins.
c. hydrophilic heads.
d. hydrophobic tails.
e. carbohydrates
B
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A map distance of 23.6 between two genes indicates which of the following?
A. The genes are 23.6 millimeters apart B. There are 23.6 other genes between the two genes of interest C. 23.6% of the offspring exhibit recombination between the two genes D. 23.6% of the offspring do not survive
Carbon dioxide in the atmosphere
a. is destroying the ozone layer. b. has dramatically increased in the last few decades. c. is one of the prime reasons for acid depositions. d. is a waste gas produced by respiration and has no biological use. e. can change spontaneously to carbon monoxide in sunlight
Which of the following is not a goal of
cloning? a. bring animals back from extinction. b. form replacement tissues and organs. c. increase numbers of endangered animals. d. clone valuable livestock. e. all of these are goals
Blood pH becomes acidic as a result of the presence of ________ ions?
Fill in the blank(s) with the appropriate word(s).