A) always upright
B) always inverted
C) Both [a] and [b]
D) None of these
Correct Answer: A
Solution :
Pyramid of energy is always upright because the total amount of energy utilized by different trophic level organisms of an ecosystem in unit area at a set period of time. The quantity of energy trapped by green plants are highest among organisms of different trophic levels and the base of pyramid is broad.
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