Why is it difficult for small isolated populations of animals to thrive?
a. There would be less genetic diversity.
b. They would have difficulty finding a mate.
c. They are vulnerable to disease.
d. all of these
D
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Sometimes atoms gain or lose particles. The loss of which of the following would result in a change of atomic mass?
A. neutron B. proton C. electron D. a and b E. b and c
Although carbon dioxide contains carbon, it is
not considered an "organic" compound because a. it is not found in the earth's crust. b. it is not present in living cells. c. the carbon atom is not bonded to at least one hydrogen atom. d. the carbons are not in chains or rings. e. it is too small.
__________ acts on the uterus and milk ducts. Fill in the blank(s) with the appropriate word(s)
The upper, unconfined portion of the groundwater which flows into streams and is partly accessible to plants is called the ________.
A. watershed B. aquifer C. water table D. hydrozone