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Question

Pyramid of numbers in a forest ecosystem is spindle shaped.

A
True
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B
False
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Solution

The correct option is A True
Pyramid of numbers is upright for grassland and and spindle shaped for forest ecosystem. In a grassland ecosystem, the producers (grass) will be maximum and primary consumers like rabbits feeding on the grass will be less numerous.The snakes feeding on these rabbits will be even lesser and then the eagle or vulture feeding on the primary consumers will be the least in count. Thus the pyramid for grassland is upright. In a forest ecosystem however, the producers are large sized trees which make the base of pyramid. The herbivores such as fruit eating birds, deer, elephants etc. make the primary consumers which are more numerous than the trees. These herbivores support fewer number of carnivores and thus the pyramid of numbers is thus spindle shaped.

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