The pyramid of numbers is spindle shaped in case of ____.
A
parasitic food chain
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B
Grassland ecosystem
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C
Forest ecosystem
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D
lake ecosystem
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Solution
The correct option is A
parasitic food chain
In a forest ecosystem, the producers are large size trees which make the base of pyramid. The herbivores such as fruit eating birds, deer, elephants etc. make the primary consumers and are more than producers but these herbivores support fewer number of carnivores. Hence, the pyramid of numbers becomes spindle shaped. Thus pyramid of number can vary in its standing depending on the ecosystem.