The oceans affect the biosphere by(A)absorbing a substantial amount of the biosphere's oxygen.(B)regulating the pH of freshwater biomes and terrestrial groundwater.(C)decreasing winter temperatures of coastal terrestrial biomes.(D)removing carbon dioxide from the atmosphere.

Which of the following is characteristic of most terrestrial biomes?a. a distribution predicted almost entirely by rock and soil patternsb. clear boundaries between adjacent biomesc. vegetation demonstrating vertical layeringd. cold winter months

Which of the following groups is (are) absolutely essential to the functioning of an ecosystem?a. producersb. producers and herbivoresc. producers, herbivores, and carnivoresd. producers and decomposers

What is the main type of vegetation in a tropical wet forest?a. shrubs and bunchgrassesb. herbs, grasses, and vinesc. broad-leaved deciduous treesd. broad-leaved evergreen trees

Areas of low solar irradiation are .a. closer to the equator than to the poles;b. closer to the poles than the equator;c. at high altitudes;d. close to large bodies of water;e. more than one of the above is correct

The oceans affect the biosphere in all of the following ways excepta. producing a substantial amount of the biosphere's oxygen.b. removing carbon dioxide from the atmosphere.c. moderating the climate of terrestrial biomes.d. regulating the pH of freshwater biomes and terrestrial groundwater.

What is one expected consequence of global climate change?a. Average rainfall will increase.b. Average rainfall will decrease.c. Variability in rainfall will increase.d. We cannot make predictions about future rainfall.

The solar equator, the region of Earth where the sun is directly overhead, moves from 23.5°N to 23.5°S latitudes and back over the course of a year. Why?a. Earth wobbles on its axis during the year;b. The position of the poles changes by this amount annually;c. Earth's axis is 23.5° from perpendicular to the rays of the sun;d. Earth moves 23.5° toward the sun in summer and 23.5° away from the sun in winter;e. Ocean currents carry heat from the tropical ocean north in summer and south in winter

Which statement about dispersal is true?(A)Dispersal is not a component of the life cycles of most plants and animals.(B)Dispersal occurs only on an evolutionary time scale.(C)Colonization of devastated areas after floods or volcanic eruptions depends on dispersal.(D)The ability to disperse does not affect the geographic distribution of a species.