Course

Biology Science

Study Pack

Set 21 Ecosystems

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Question 1

(Multiple Choice)

Free
Which of the following statements about cycling within an ecosystem is FALSE?

A) Energy is recycled within an ecosystem.
B) Carbon is recycled within an ecosystem.
C) The sedimentary nutrient cycle cycles nutrients very slowly.
D) Human activities affect nutrient cycling.

Answer

Question 2

(Multiple Choice)

Free
All of the living organisms present in an ecosystem comprise the ________ or biotic portion of the ecosystem.

A) community
B) abiotic
C) population
D) biome

Answer

Question 3

(Multiple Choice)

Free
What would happen to nutrient cycling in a forest ecosystem if all of the bacteria,protozoans,fungi,and worms were eliminated?

A) Dead plant and animal matter would accumulate more quickly than it is decomposed, and the soil would become depleted of nutrients.
B) Dead plant and animal matter would decay more rapidly than it is decomposed, and the soil would accumulate nutrients at a faster rate.
C) There would be no discernable change in the rate at which dead plants and animals decompose and no change in the rate of nutrient accumulation in the soil.
D) Dead plant and animal matter would accumulate more quickly than it is decomposed, and the soil would accumulate nutrients at a faster rate.

Answer