Imagine the river dries and the squirrel populations again share the same physical area. But they cannot interbreed. Evolutionary forces have acted independently on the populations while they were separated by the river, and ____________ has occurred.
a. selective forces
b. more
c. allopatric speciation
d. microevolutionary events
e. communicate
f. interbreed
g. less
h. gene pool
i. symmetric speciation
j. macroevolutionary events
c. allopatric speciation
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Surface Weather Map
Refer to the above surface weather map.
Between which of the following points is a cold front positioned?
A. between 1 and 2 B. between 2 and 3 C. between 2 and 5 D. between 3 and 4
Which of the following is the most accurate when comparing a snow-covered surface to other natural surfaces?
A. the wind speed will be higher over the snow-covered surface B. the air temperature will be colder over the snow-covered surface C. precipitation is more likely to fall over the snow-covered surface D. the air will be more unstable over the snow-covered surface
Although it currently does not have an ocean, ____ is thought to have had one in the distant past
a. Europa b. Saturn c. Jupiter d. Mars
Which of the following best describes how far the Moon is from Earth and the Sun?
a. The Moon is much closer to the Sun that it is to the Earth b. The Moon is much closer to the Earth than it is to the Sun c. The Moon is closer to either Earth or the Sun depending on the time of year d. The Moon is about the same distance from Earth as it is from the Sun