Effects of Cycles on Ecosystems

Question 1

Which of the following is not a way in which carbon gases are introduced into the atmosphere? a. forest fires b. respiration c. photosynthesis d. burning of fossil fuels Please select the best answer from the choices provided

Revolt · Accepted Answer

C

Question 2

Which of the following statements about the phosphorus cycle is true?a.In living organisms, phosphorus can be found in nucleic acids.b.Phosphorus in aquatic ecosystems is only found in sediment.c.Elevated levels of phosphorus in aquatic ecosystems is always beneficial. d.The soil plays no part in the phosphorus cycle.

Revolt · Accepted Answer

A

Question 3

In the carbon cycle, carbon is found in _______.a.the atmosphereb.the soilc.living organismsd.all of the above

Revolt · Accepted Answer

D

Question 4

Explain the role of organisms in the carbon cycle.

Revolt · Accepted Answer

Organisms move carbon through the carbon cycle by taking in, storing, and releasing it. Plants absorb carbon dioxide during photosynthesis and convert it into organic matter. Animals acquire carbon by feeding, while respiration and decomposition return carbon dioxide to the atmosphere.

Question 5

What effect do abiotic cycles have on ecosystems?

Revolt · Accepted Answer

Abiotic cycles have a great impact on ecosystems. When the cycles occur more frequently, like the water cycle in the rainforest, the living components of the ecosystem respond accordingly. The organisms in the rainforest are adapted to the conditions of abiotic cycles in that region. The organisms in the desert are also adapted to the conditions of abiotic cycles in their region.

Question 6

Plants in the desert _______.a.effectively conserve and retain water b.have high levels of transpirationc.release 50-80% of water back into the ecosystemd.make their own precipitation

Revolt · Accepted Answer

A

Question 7

Hibernation is _______.a.an example of an abiotic cycleb.triggered by changes in the weatherc.caused only by biotic factorsd.triggered by breeding patterns

Revolt · Accepted Answer

B

Effects of Cycles on Ecosystems Answers

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