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Small animals are rarely found in Polar ...

Small animals are rarely found in Polar regions .Why?

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Smaller animals tend to lose more body heat due to large surface area relative to their volume.
Therefore, they have to spend more energy to generate body heat.
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OSWAAL PUBLICATION-ORGANISMS AND POPUIATIONS-TOPIC :1 Short Answer Type Questions-I
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  16. Why the small birds like humming birds are not · found in Polar Region...

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