Which category had the highest amount of endangered species in 2012?
a. amphibians
b. insects
c. mammals
d. plants
D
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What would happen if organisms that play the role of heterotrophic bacteria did not exist in the marine environment?
What will be an ideal response?
An indicator of programmed cell death is
a. fragmented chromatin. b. swelling of the membrane. c. cell lysis. d. loss of transcription control. e. All of the above
Based on this graph, what is the relationship between metabolic rate and body temperature?
A) When metabolic rate drops, so does body temperature. B) When metabolic rate drops, body temperature rises. C) When metabolic rate drops, body temperature remains constant.
Which of the following adversely affects the ozone layer?
A. oil B. plastics C. coal and natural gas D. greenhouse gases E. chlorofluorocarbons