User: Most insects use external sources of heat to achieve their operative temperature range. Heinrich's research on the sphinx moth (Manduca sexta) indicates that some insects can thermoregulate by using their flight muscles and: A. using their blood as a coolant. B. decreasing their metabolic rate. C. possessing an internal respiratory system. D. using a countercurrent heat exchange mechanism.

Weegy: A. using their bloods as coolant
Expert answered|ramir420|Points 15|

User: The thermal stability of aquatic environments is a result of the: A. high specific heat of water. B. low latent heat of vaporization of water. C. low latent heat of fusion of water. D. All of the choices are correct.

Weegy: The thermal stability of aquatic environments is a result of the high specific heat of water. Your answer is A. high specific heat of water.
Expert answered|shaggy4444|Points 10|