Conformers: Heat loss or heat gain is a function of surface area. These small animals have a large surface area relative to their volume. They tend to lose body heat very fast when it is cold outside. Then they have to expend much energy to generate body heat through metabolism. This is the main reason why they are rarerly found in polar regions.
1. Why is the polar region not a suitable habitat for tiny humming birds?
2. Humming brids live among the bushes in tropics while penguins live on icebergs. They cannot survive if their habitats are reversed. Justify
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