Fossils of Thrinaxodon, a species that lived during the Triassic period, have been found in both South Africa and Antarctica. Thrinaxodon had a reptile-like skeleton and laid eggs, but small depressions on the front of its skull suggest it had whiskers and, therefore, fur. Thrinaxodon may have been warm-blooded. The fossils of Thrinaxodon are consistent with the hypothesis that _____.
A) fossils found in a given area look like the modern species in that same area
B) the environment where it lived was very warm
C) mammals evolved from a reptilian ancestor
D) Antarctica and South Africa separated after Thrinaxodon went extinct
C
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a. humans b. birds c. marine mammals d. insects e. horses
What would be the best approach to curbing excessive human population growth?
A. lowering birth rates through education and family planning B. a return to historical health care practices C. encouraging women to postpone children till after age 35 D. embracing traditional agricultural practices
Australopithecines:a
were bipedal. b. had brains equivalent to those of modern humans. c. had prehensile tails. d. knuckle walked. e. had narrow pelvis
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A) hydrophobic. B) nonpolar. C) a large molecule. D) a small molecule. E) polar.