Exam 46: Ecosystems

Each tier of the biomass pyramid depicts the ____ of all the organisms in an ecosystem.

Gross primary productivity refers to the total

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 -__________ refers to nutrient enrichment of any ecosystem that is otherwise low in nutrients.

The following questions refer to the figure above illustrating a tallgrass prairie food chain. -The most amount of energy is available to

Detritivores are

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 -food chain

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 -In a __________, water or some nutrient moves from an environmental reservoir, through organisms, then back to the environment.

Which gas is increasing in the atmosphere and intensifying the greenhouse effect?

Most of the carbon now present in the earth's atmosphere will eventually end up in what two reservoirs?

Like ____, phosphorus can only be taken up by plants in ____.

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 conversion of gaseous nitrogen first to ammonia and then to other nitrogenous compounds involves this.

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 -Most fungi function as this.

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 __________ is an area where all precipitation drains into a specific waterway.

The primary consumers in natural communities are

Which of the following are in order from primary producer to 4^th trophic level?

A network of interactions that involves the cycling of materials and the flow of energy among organisms and their physical environment is

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 -legumes

The ultimate source of all energy in a terrestrial ecosystem is

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 -An __________ consists of an array of organisms along with nonliving components of their environment.

The following questions refer to the figure above illustrating a tallgrass prairie food chain. -A second level consumer is indicated by