[Campbell Biology P.937] How do the acclimatization mechanisms in ectotherms, as described i... | Practice Question

How do the acclimatization mechanisms in ectotherms, as described in the text, primarily differ from those described for birds and mammals endotherms ?

  • A: Ectotherms primarily adjust insulation, while endotherms modify cellular processes.
  • B: Ectotherms produce 'antifreeze' proteins; endotherms rely solely on behavioral adjustments.
  • C: Ectotherms often involve cellular-level adjustments like enzyme variants and lipid changes, whereas endotherms typically adjust insulation.
  • D: Both ectotherms and endotherms primarily adapt by increasing metabolic rate to generate heat.

Explanation

The text states that 'Acclimatization in endotherms often includes adjusting insulation—growing a thicker coat of fur...'. For ectotherms, it says 'Acclimatization in ectotherms often includes adjustments at the cellular level. Cells may produce variants of enzymes... Also, the proportions of saturated and unsaturated lipids in membranes may change'. This clearly outlines the primary difference.