The modern synthesis was a fusion of ______.
a. genetics and evolutionary biology
b. population ecology and genetics
c. molecular biology and comparative anatomy
d. the fossil record and genetics
Ans: a. genetics and evolutionary biology
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An action potential begins when
a. sodium channels open. b. potassium channels open. c. both sodium and potassium channels open. d. sodium channels close. e. both sodium and potassium channels close
Frogs differ from other land vertebrates in that _____
a. the circulatory system does not play a role in respiration b. lungs take in oxygen but do not release carbon dioxide c. the respiratory surface is in their gills d. they do not possess lungs e. they take in oxygen through lungs but release carbon dioxide from gills
Imprinting is a
a. response to a stimulus. b. learned behavior that occurs during a critical time period. c. fixed action pattern. d. decline in the level of a response to a nonthreatening stimulus. e. type of learning that involves solving novel problems.
The Mesozoic era lasted from
A. 65 million years ago to 2 million years ago. B. 500 million years ago to 250 million years ago. C. 250 million years ago to 65 million years ago. D. 540 million years ago to 250 million years ago. E. one billion years ago to 500 million years ago.