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"The conformer had not evolved to become...

"The conformer had not evolved to become regulators". Justify the statement.

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(a) Thermoregulation is energetically expensive for many animals.
(b) Small animal like shrews and humming birds cannot afford so much energy for thermoregulation.
(c) Heat loss or heat gain is a function of surface area.
(d) Small animals have larger surface area relative to their volume.
(e) They tend to lose body heat very fast when it is cold outside.
(f) Then they have to expend much energy to generate body heat through metabolism.
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