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Unformatted text preview: Heat is lost- body surface area to volume ratio is greater Small organisms v. big organisms Small organisms (endotherms): have a bigger challenge, especially in cold environments. Big organisms- have a bigger challenge, especially in warm environments. Shrew: smallest mammal-have to eat all the time Hummingbird: smallest bird-torpev : temporary reduction in metabolic rate to conserve energy....
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- Spring '08