Molecular evolution refers to which of the following?
A. accumulation of different mutations in
different populations
B. mutation of biological molecules over time
C. shared mutations in different populations
D. evolution of biological molecules from nonbiological
molecules
A
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A population includes
(a) all organisms of the same species in one place at a given moment. (b) the organisms and their physical environment. (c) the physical environment in which an organism exists. (d) all organisms within the environment at a given moment.
The polynucleotide chain of DNA has polarity: the 5¢ end has a bound ____, while the 3¢ end has a bound ____
a. deoxyribose sugar, ribose sugar b. adenine, thymine c. cytosine, guanine d. hydroxyl group, phosphate group e. phosphate group, hydroxyl group
Viruses that infect bacteria are:
a. Not known to exist b. Prions c. Bacteriophages d. Composed of protein only e. Also capable of causing disease in humans
Crossing over is partially responsible for our genetic diversity
a. True b. False