Adaptive measure to protect against extreme heat by poikilotherms is a. Hibernation b. Sweating c. Aestivation d. Cooling
Option C. Aestivation is a state of inactivity occurring in some animals, notably lungfish, during prolonged periods of drought or heat. Feeding, respiration, movement, and other bodily activities are considerably slowed down. It is usually seen in poikilotherms as an adaptive measure to protect themselves from extreme heat.
