Answer questions 12-16 , I need the letter of your answer

Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN:9781305389892
Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan
Chapter54: Ecosystems And Global Change
Section: Chapter Questions
Problem 10TYK: Which of the following statements is supported by the results of studies at the Hubbard Brook...
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Answer questions 12-16 , I need the letter of your answer

12. Why are there fewer organisms at the top of an
energy pyramid?
A. Very little energy is available on the top
level
B. Organisms at the top have complicated
family structures to support
C. These organisms have the fewest food
sources
D. Organisms at the top level live longer than
those on lower levels
13. Only 10 percent of the energy stored in an
organism can be passed on to the next trophic level.
Of the remaining energy, some is used for the
organism's life processes, and the rest is
A. used in reproduction.
B. stored as fat.
C. stored as body tissue.
D. eliminated as heat.
14. Matter can recycle through the biosphere
because
A. matter is passed out of the body as waste.
B. matter is assembled into chemical
compounds.
C. biological systems do not use up matter,
they transform it.
D. biological systems use only carbon, oxygen,
hydrogen, and nitrogen
15. What happens when organisms die and decay?
A. Their bodies are lifted up
B. Their nitrogen returns to the soil
C. they keep their nitrogen
D. They stay on earth forever
16. How do organisms play an important role in the
carbon cycle?
A. Plants absorb carbon from the
environment in photosynthesis and return it
in respiration.
B. Animals obtain their carbon by eating
plants; they release carbon in respiration.
C. Microorganisms (such as fungi and
bacteria) return carbon to the environment
when they decompose dead plants and
animals.
D. All of the above
Transcribed Image Text:12. Why are there fewer organisms at the top of an energy pyramid? A. Very little energy is available on the top level B. Organisms at the top have complicated family structures to support C. These organisms have the fewest food sources D. Organisms at the top level live longer than those on lower levels 13. Only 10 percent of the energy stored in an organism can be passed on to the next trophic level. Of the remaining energy, some is used for the organism's life processes, and the rest is A. used in reproduction. B. stored as fat. C. stored as body tissue. D. eliminated as heat. 14. Matter can recycle through the biosphere because A. matter is passed out of the body as waste. B. matter is assembled into chemical compounds. C. biological systems do not use up matter, they transform it. D. biological systems use only carbon, oxygen, hydrogen, and nitrogen 15. What happens when organisms die and decay? A. Their bodies are lifted up B. Their nitrogen returns to the soil C. they keep their nitrogen D. They stay on earth forever 16. How do organisms play an important role in the carbon cycle? A. Plants absorb carbon from the environment in photosynthesis and return it in respiration. B. Animals obtain their carbon by eating plants; they release carbon in respiration. C. Microorganisms (such as fungi and bacteria) return carbon to the environment when they decompose dead plants and animals. D. All of the above
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