Which of the following is not a step in the process of natural selection?
A. The population produces more offspring than the environment can support
B. members of a population possess heritable variations
C. Over multiple generations of reproducing, a larger proportion of the population will have those favorable traits and thus adaptation has occurred.
D. Individuals who have favorable traits survive and reproduce more than those individuals lacking such traits.
E. People select which individuals breed and which ones do not.
Ans: E. People select which individuals breed and which ones do not.
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The summer of 2008 brought the worst fire season in 50 years to California. The reason for this was
a. very high temperatures. b. an abnormally long summer season. c. a series of dry winters. d. a series of short winters. e. a series of warm winters.
Most of the energy available to a primary consumer
a. will be used up in various biological activities. b. will be converted into biomass. c. is obtained directly from solar energy. d. will be passed on to the animal that feeds upon it. e. will remain with the consumer until death.
The occurrence of streptococcal bronchopneumonia in an individual recovering from influenza is an example of a/an
A) secondary infection B) chronic infection C) sporadic infection D) latent infection E) subacute infection
Which of the following is NOT a distinguishing characteristic of prokaryotic cells?
A) Their DNA is not enclosed within a membrane. B) They lack membrane-enclosed organelles. C) They have cell walls containing peptidoglycan. D) Their DNA is not associated with histones. E) They lack a plasma membrane.