Chapter 42 Manatt – Flashcards

An ecosystem is unlikely to be limited by the supply of... because it is obtained from the air. A. water B. carbon C. phosphorus D. calcium

Biogeochemical cycles are crucial to ecosystem function because _____. A. they keep the planet warm enough for living things to survive B. nutrients and other life-sustaining molecules are in limited supply and must be continually recycled C. energy flows through ecosystems in one direction only and is eventually dissipated as heat D. they remove poisons and keep them locked up in "sinks"

_____ removes nitrogen from the atmosphere. A. Nitrification B. Mineralization C. Nitrogen fixation D. Assimilation

Denitrifying bacteria convert... to... A. nitrogen gas ... nitrites B. ammonium ... nitrogen gas C. nitrogen gas ... nitrates D. nitrates ... nitrogen gas

Which one of these is a nitrate? A. NH2 B. SH C. NO3 - D. NO2 -

Which one of these is a nitrite? A. NO2 - B. NH2 C. PO4 - D. NO3 -

Nitrifying bacteria convert... to... A. nitrogen gas ... nitrates B. ammonium ... nitrites C. nitrates ... nitrogen gas D. ammonium ... nitrogen gas

Which of the following statements about the movement of nutrients through an ecosystem is true? A. Carbon cycles between the atmosphere and living biomass. B. A biogeochemical cycle is the path that an element takes as it moves from organism to organism. C. An organism transfers only its energy to the organism that eats it. D. Nutrients in the soil can be eaten and used directly by animals.

How do greenhouse gases contribute to global warming? A. They prevent the oceans from absorbing shorter wavelengths of light. B. They block solar energy from reaching Earth's atmosphere. C. They prevent infrared light from leaving Earth's atmosphere. D. They allow excess radiant light to leave Earth's atmosphere.

How does carbon move from the biota to the atmosphere? A. Carbon is incorporated into sedimentary rocks. B. Carbon dioxide is released during cellular respiration. C. Carbon dioxide is released during photosynthesis. D. Carbon dioxide diffuses into the atmosphere.

Which area is not one of the three major reservoirs of the global carbon cycle? A. Oceans. B. Sedimentary rock. C. Terrestrial ecosystems. D. Atmosphere.

True or false? Local biogeochemical cycles are isolated within their particular ecosystem and all ions and molecules remain in that ecosystem permanently. True False

Name the 4 cycles.

What name is given to the process by which detritivores return carbon to the atmosphere? A. predation B. photosynthesis C. predation and photosynthesis D. decomposition

How much energy is transferred on to each trophic level? A. 4% B. 40% C. 25% D. 10%

Detritus is composed of ... A. dead organic matter B. inorganic minerals C. excreted wastes D. dead organic matter and excreted wastes

Which of the following removes carbon from the atmosphere? A. rabbits B. burning fossil fuels, such as oil C. bobcats D. algae/plants

Name one of the 3 strategies of ecosystem restoration.

What does GPP mean?

What does NPP mean?

Name all of the strategies of ecosystem restoration.

What is the law of conservation of mass?

Nutrients are cycled through an ecosystem while energy...

What is involved in all 4 cycles?