The ranges of black bears and brown bears overlap. However, black bears spend most of their time in
the woods and brown bears spend most of their time along the river. Which of the following best
describes why black and brown bears do not interbreed?
a. environmental isolation
b. biological isolation
c. evolutionary isolation
d. habitat isolation
e. temporal isolation
D
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Deforestation in areas like Madagascar can significantly affect the water cycle. Why is this?
A. Less moisture is transpired into the atmosphere. B. It is more difficult for soil nutrients to leech into streams. C. Weathering of rocks and soil does not release nutrients to bind to water. D. The rate of evapotranspiration increases dramatically. E. Cloud cover will increase.
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What will be an ideal response?
The additive effect of one neuron sending many EPSPs to another neuron over a brief period of time is
called spatial summation.
Indicate whether the statement is true or false.Name and describe several hormones that affect digestion in the gastrointestinal tract
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