What effect do assortative matings have on populations?
A) They cause one sex to be much different than the other.
B) They cause isolated groups to be more similar to each other.
C) They increase the rate of mutations.
D) They maintain appearance differences between groups.
D
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The RNA "alphabet" used in the genetic code has ____ letters
a. 5 b. 64 c. 4 d. 20 e. 3
Imagine that you are monitoring a test subject's blood. The pH of the blood is steadily decreasing, while the carbon dioxide levels are steadily increasing. What do you predict will occur?
A. Because of the increase in carbon dioxide levels, the brain will decrease in the breathing rate. B. Because of the increase in carbon dioxide levels, the brain will stimulate an increase in the breathing rate. C. As soon as oxygen levels decrease, the brain will stimulate an increase in the breathing rate.
Ecosystems lose energy in the form of ____
a. metabolic heat b. sunlight c. carbon dioxide d. oxygen e. decomposition
The sensory nerves of the somatic portion of the peripheral nervous system:a
transmit information from internal receptors to the central nervous system. b. transmit information from sensory organs to the central nervous system. c. transmit information from the central nervous system to glands. d. transmit information from the central nervous system to skeletal muscles. e. regulate cardiac activity. What will be an ideal response?