Which factor most likely caused animals and plants in India to differ greatly from species in nearby southeast Asia?
A) The climates of the two regions are similar.
B) India is in the process of separating from the rest of Asia.
C) Life in India was wiped out by ancient volcanic eruptions.
D) India was a separate continent until forty-five million years ago.
D
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The streamlined bodies seen in sharks, tuna, and dolphins best relate to
A. a recent shared common ancestor. B. dissimilar selection pressures. C. the physical properties of water. D. the need to escape fast-moving predators. E. intelligent design.
To reduce drag whales have eliminated
a. external ears. b. pectoral fins. c. external appendages. d. mammary glands. e. flukes.
Which of the following is a function of the sterols that are found in animal cell membranes?
a. They maintain membrane fluidity. b. They facilitate ion transport. c. They store cellular energy. d. They increase the rate of diffusion.
Which is a member of the domain Archaea?
A) gram-positive bacteria B) methanogens C) spirochetes D) chlamydias