The hominin group includes
A) Homo sapiens only.
B) Homo sapiens and several extinct human relatives.
C) humans and all other apes.
D) all anthropoids.
Answer: B
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In which tissue would you look for cells that function in point-to-point communication?
a. connective. b. epithelial. c. muscle. d. nervous.
An aneurysm is a weakening of the walls of a blood vessel. Which of the following blood vessels would be most likely to break open if an aneurysm is present?
A) capillary B) lymph duct C) artery D) venule
Like all theories, the cell theory is never accepted by scientists as an "absolute truth." Which statement best explains why?
A) A theory evolves from collecting information, forming hypotheses, and then verifying the predictions of the hypotheses. B) A theory is only a collection of hypotheses that have been verified by experimentation. C) A scientific theory is not based on experimental evidence or observations. D) Future evidence may cause a theory to be modified or even rejected
Punctuated equilibrium proposed by Eldredge and Gould in 1972 is an evolutionary process that involves
A. gradual change observable in the fossil record with very little, if any, stasis. B. gradual change observable in the fossil record followed by periods of no change at all. C. "spurts" of change observable in the fossil record with very little if any stasis. D. gradual change observable in the fossil record followed by periods of stasis. E. "spurts" of change observable in the fossil record followed by periods of stasis.