What keeps the two populations separate?
A) temporal reproductive isolation
B) lack of hybrid viability
C) behavioral reproductive isolation
D) habitat isolation
D
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Which molecule is incorrectly matched with the number of carbon atoms it possesses?
A) citrate-6 B) ?-ketoglutarate-5 C) acetyl CoA-2 D) malate-5 E) isocitrate-6
This animal is acoelomate, has a gastrovascular
cavity, and light-detecting eyespots. This animal is ___.
a. a planarian b. a tapeworm c. an earthworm d. a fluke e. more than one of these
In freshwater sponges and other simple freshwater
animals, water flows into the body by __________. Fill in the blank(s) with the appropriate word(s).
Most of Darwin's observations about changes in species over time and in different environments took place in and near
A. Africa. B. Greenland. C. South America. D. Asia. E. North America.