Exam 46: Ecosystems

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 -Would you describe the water cycle as slow or rapid?

The following questions refer to the figure above. -Decomposers are indicated by

The following questions refer to the figure above. -Carnivores are indicated by

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 nitrates, converting them to gaseous nitrogen, 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 -The __________ is a sedimentary cycle; Earth's crust is the largest reservoir, and there is no major gaseous form.

Most of the earth's usable carbon is in its

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 nitrogen-containing wastes 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 -The process whereby nitrite is converted to nitrate is an important part of this process.

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 -gross primary production

Nitrification

Which of the following is NOT involved in nitrogen fixation?

Ecosystems may lose nitrogen through

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 -Which trophic level in a food chain would it be most damaging to remove?

The following questions refer to the figure above illustrating a tallgrass prairie food chain. -How many levels of consumption are depicted in the figure?

Which of the following does NOT cycle through an ecosystem?

Which of the following represents energy flow in a grazing food web?

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 Venus flytrap devouring an insect to obtain nitrogen functions 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 -In __________ food chains, most energy flows from producers directly to detritivores and decomposers.

The following questions refer to the figure above illustrating a tallgrass prairie food chain. -An herbivore is indicated by

Phosphate is introduced to ecosystems via: