The salivary amylase gene (AMY1) is present in two diploid copies in chimpanzees. Humans are known to have between 6-15 copies, an adaptation that is thought to be related to the high-starch diet of humans
This difference among humans is an example of
A. G banding.
B. copy number variation
C. a simple translocation.
D. a reciprocal translocation.
B
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The sirenians
a. rest on shore. b. bear young on land. c. are completely aquatic. d. are fish eaters. e. don't have blubber since they live in tropical water
Why are some experts concerned about the use of the Bt toxin in agriculture?
a. Insects may develop resistance to the Bt toxin. b. The Bt toxin may be harmful to most mammals. c. The Bt toxin is not approved for organic farming. d. New diseases are introduced by the Bt toxin.
The brain knows how strong a stimulus is
because the brain interprets
a. action potentials of certain nerves in certain ways. b. variations in the rate of action potentials. c. the size variation in the action potential being propagated. d. all of these. e. all of these except size variation in the action potential being propagated
Each kingdom has a distinguishing characteristic. What is a characteristic of the kingdom Monera?
A) They reproduce sexually. B) Their cells are surrounded only by a cell membrane. C) Their cells do not contain any specialized structures. D) They produce their own nutrients.