Exam 46: Ecosystems

Classification.Respond to the following statements with reference to the five trophic categories listed below. a.producer b.primary consumer c.secondary consumer d.tertiary consumer e.decomposer -A bear eating blueberries is functioning as this.

Approximately what percent of the energy that enters a trophic level becomes available to the next trophic level?

The concept of an ecosystem differs from that of a community in that, unlike the community, the ecosystem includes the

Algal blooms deplete the water of

Classification.Respond to the following statements with reference to the four steps of the nitrogen cycles listed below. a.nitrogen fixation b.nitrification c.denitrification d.ammonification -The action of bacteria on ammonia, ultimately converting it to nitrate, involves this process.

Classification.Respond to the following statements with reference to the four steps of the nitrogen cycles listed below. a.nitrogen fixation b.nitrification c.denitrification d.ammonification -A __________ shows one path of energy and nutrient flow among organisms.

The following questions refer to the figure above. -The figure illustrates

Classification.Respond to the following statements with reference to the five trophic categories listed below. a.producer b.primary consumer c.secondary consumer d.tertiary consumer e.decomposer -A bear feeding on a salmon is functioning as this.

MATCHING Matching.Choose the one most appropriate answer for each. a.rate at which energy becomes stored in organic compounds through photosynthesis b.total amount of solar energy stored in organic compounds during photosynthesis c.a straight-line sequence of steps by which chemical bond energy moves to higher trophic levels d.the potential chemical energy remaining (after aerobic respiration by autotrophs) that can be passed on to other trophic levels e.DDT in the environment f.a kind of plant that increases soil nitrogen content g.particles of organic waste products, dead, or partly decomposed tissues -detritus

Carbon is introduced into the atmosphere by all EXCEPT which of the following means?

Classification.Respond to the following statements with reference to the four steps of the nitrogen cycles listed below. a.nitrogen fixation b.nitrification c.denitrification d.ammonification -There is a __________ flow of energy into and out of an ecosystem, and a cycling of materials among resident species.

Classification.Respond to the following statements with reference to the four steps of the nitrogen cycles listed below. a.nitrogen fixation b.nitrification c.denitrification d.ammonification -__________ is an energy-intensive method of obtaining fresh water from __________.

Decomposers recycle materials at ____ trophic level(s).

MATCHING Matching.Choose the one most appropriate answer for each. a.rate at which energy becomes stored in organic compounds through photosynthesis b.total amount of solar energy stored in organic compounds during photosynthesis c.a straight-line sequence of steps by which chemical bond energy moves to higher trophic levels d.the potential chemical energy remaining (after aerobic respiration by autotrophs) that can be passed on to other trophic levels e.DDT in the environment f.a kind of plant that increases soil nitrogen content g.particles of organic waste products, dead, or partly decomposed tissues -primary productivity

MATCHING Matching.Choose the one most appropriate answer for each. a.rate at which energy becomes stored in organic compounds through photosynthesis b.total amount of solar energy stored in organic compounds during photosynthesis c.a straight-line sequence of steps by which chemical bond energy moves to higher trophic levels d.the potential chemical energy remaining (after aerobic respiration by autotrophs) that can be passed on to other trophic levels e.DDT in the environment f.a kind of plant that increases soil nitrogen content g.particles of organic waste products, dead, or partly decomposed tissues -net primary production

Most of the water vapor in the earth's atmosphere comes from evaporation from

The pyramid of energy illustrates

Nitrous oxide

Which of the following is NOT dependent on the others as a source of food?

Which of the following indicators of global warming has (have) occurred?