A cow consumes carbon by eating plants, digests the plant, and exhales carbon dioxide. What step in the carbon cycle does this represent?
Fill in the blanks. When conditions are not conducive to ________ organic material can be subject to ___________.
A) assimilation, erosion
B) decomposition, fossilization
C) weathering, respiration
D) sedimentation, fixation
What types of organisms are likely to contribute most to respiration, decomposition, and excretion?
A) Fungi and microbes
B) Vertebrate animals
Why do logged tropical rain forest soils typically have nutrient-poor soils?
A) Tropical bedrock contains little phosphorous.
B) Logging results in soil temperatures that are
lethal to nitrogen-fixing bacteria.
C) Most of the nutrients in the ecosystem are removed in the harvested timber.
D) The cation exchange capacity of the soil is reversed as a result of logging.
Carbon enters all food webs through _____, and is released back to the atmosphere or ocean via _____.
A) heterotrophs; cellular respiration
B) autotrophs; cellular respiration
C) heterotrophs; photosynthesis
D) autotrophs; decomposition
Find the answers and more review questions on Quizlet: https://quizlet.com/373049510
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