Keystone species:a
are always symbionts.
b. are typically not the most abundant species in the community.
c. illustrate secondary succession.
d. always form the base of a food chain.
e. are only found in tropical communities
b
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Differences in domesticated animals over relatively short periods of time most likely occur through:
A. natural selection B. artificial selection C. adaptation D. experimental selection E. evolution
Which of the following groups of vertebrates lacks bone?
A. ray-finned fishes B. sharks C. amphibians D. reptiles E. birds
Archeologists digging through several layers of rock discover fossils in the different layers
Typically, the deeper the fossil layer, the older the specimen. This is an example of what type of dating?
a. relative dating b. absolute dating c. radiometric dating d. geometric dating
Where do the electrons that are excited by the energy in sunlight first come from?
A) NADPH B) ATP C) Sugar D) Water