Explain how Darwin’s observations during his 5-year voyage on the Beagle led him to change his mind about the
fixity of species. What will be an ideal response?
Fossils of mammals Darwin collected in South America were similar to modern llamas,
sloths, and armadillos, but also differed from them. Darwin also observed 13 species of
finches living on the Galapagos Islands, and he postulated that they evolved from a single
species now living on South America’s Pacific Coast. Darwin suggested that these organisms
adapted to changing environmental conditions in much the same way that humans for
millennia had introduced desirable characteristics into breeds of domesticated plants and
animals by artificial selection
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As a result of China's "one-child" policy, the number of baby boys far outweighs the number of baby girls
Indicate whether the statement is true or false
Ocean acidification results in which of the following?
A) A decrease in ocean pH, resulting in less calcium carbonate available for plankton and corals to build shells and exoskeletons B) An increase in ocean pH, resulting in more calcium carbonate available for plankton and corals to build shells and exoskeletons C) A decrease in ocean pH, resulting in more calcium carbonate available for plankton and corals to build shells and exoskeletons D) An increase in ocean pH, resulting in less calcium carbonate available for plankton and corals to build shells and exoskeletons
Polyploidy is an evolutionary mechanism that may result in
A. the baldness trait becoming dominant in men. B. a surge in birthrates in mammals. C. new plant species. D. death if recessive.
Suppose it is snowing outside and the air is saturated. The air temperature and dew point are both 15°F, and the actual vapor pressure is 3 mb. If this air is brought indoors and warmed to 75°F, what would the relative humidity of this air be, assuming that its moisture content does not change? (The saturation vapor pressure at 75°F is 30 mb)
a. 5 percent b. 10 percent c. 30 percent d. 50 percent e. 100 percent