Which of the following is not true of photosynthesis?
A) It converts sunlight into carbohydrates.
B) Sunlight is used to energize electrons.
C) It releases both oxygen and carbon dioxide.
D) It requires sunlight, carbon dioxide and water as substrates.
Organisms performing photosynthesis are _____.
D) primary consumers.
Despite wide variations in the nature of the external energy source utilized by various organisms, all organisms use the following chemical compound as an internal energy source:
Fill in the blanks: In the aphotic zone _______ availability is limited, and most organisms are __________.
A) nitrogen, autotrophs
B) light, heterotrophs
C) water, autotrophs
D) phosphorous, heterotrophs
In general, which of the following represents the correct ordering of carbon:nitrogen ratio, from largest to smallest?
A) Animal tissue, live plant tissue, dead plant tissue
B) Dead plant tissue, live plant tissue, animal tissue
C) Live plant tissue, dead plant tissue, animal tissue
D) Live plant tissue, animal tissue, dead plant tissue
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