In Earth's history, what might the cooling of the Earth and the resulting change from a forested to a grassy landscape have made adaptive in humans?
A. grasping fingers
B. complex language
C. social structure
D. bipedalism
D. bipedalism
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The gradual change in specific human mitochondrial DNA sequences along a river illustrates
A) a founder effect. B) a population bottleneck. C) a cline. D) spontaneous mutation.
The greatest amount of fluids in a human body is found in the _____
1.extracellular fluid 2.interstitial fluid 3.intracellular fluid 4.plasma
There are several checkpoints in the mitotic cell cycle. All occur in the S phase
Indicate whether the statement is true or false
Pseudocoelomates have a body cavity that is not completely lined with __________. These animals
include __________ and roundworms. a. endoderm; nemerteans b. endoderm; flatworms c. mesoderm; rotifers d. mesoderm; flatworms e. mesoderm; nemerteans