Biology Chapter 34 - The sum of all Earths ecosystems is...

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The sum of all Earthʹs ecosystems is called the A) troposphere. B) stratosphere. C) lithosphere. D) hydrosphere. E) biosphere. E The primary source of energy for hydrothermal vent communities is A) reduction of sulfates in the vent water. B) reduction of carbon dioxide in the vent water. C) oxidation of petroleum compounds in the vent water. D) the heat of the water emerging from the vents. E) oxidation of hydrogen sulfide in the vent water. E While on a walk through a forest, you notice birds in trees, earthworms in the soil, and fungi on plant litter on the forest floor. Based on your observations, you conclude that each of these organisms occupies a different A) habitat. B) abiome. C) biosphere. D) biome. E) ecosystem. A The level of ecologic organization that incorporates abiotic factors is the A) ecosystem. B) symbioses C) species. D) population. E) community A Rachel Carsonʹs book, Silent Spring, deals with the A) environmental effects of pesticides. B) hydrological cycle. C) destruction of polar habitats caused by global warming. D) fate of tropical rain forests. E) effects of lynx predation on snow hare populations. A The immediate results of the widespread use of pesticides and fertilizers included ________, but long-term results included ________. A) dramatic increases in crop yields . . . the evolution of pest resistance
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B) dramatic declines in crop pests . . . localized distribution of DDT C) terrible declines in agricultural productivity . . . worldwide distribution of DDT D) global declines in undesirable pests, such as mice, rats, crows, and sharks . . . increases in these pests E) the increased spread of malaria . . . delayed resistance to pesticides A In many dense forests, plants living near the ground level engage in intense competition for A) water. B) carbon dioxide. C) sunlight. D) oxygen. E) nitrogen. C Which of the following environmental factors usually has the greatest direct effect on an organismʹs rate of water loss by evaporation? A) barometric pressure B) fires, hurricanes, and tornadoes C) wind D) moisture E) soil type C The reason that the pronghorn antelope is not found outside North America is most likely that A) there are too many pronghorn predators outside North America. B) its temperature requirements are stringent and not met outside North America. C) it is a relatively new species in evolutionary terms. D) its nutritional requirements cannot be met outside this region. E) it has never dispersed beyond this region. E The adaptations of pronghorns A) to the open plains and shrub deserts of North America have helped them spread to nearly every continent. B) demonstrate that meeting the demands of local environmental conditions helps organisms extend their ranges to other types of environments. C) allow them to survive in forests, since they are herbivores. D) include a reflective coat, an ability to find small pools of water, and chemical defenses against most predators.
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