An animal’s inputs of energy and materials would exceed its outpu...

Question

An animal’s inputs of energy and materials would exceed its outputs
a. if the animal is an endotherm, which must always take in more energy because of its high metabolic rate.
b. if it is actively foraging for food.
c. if it is growing and increasing its mass.
d. never; due to homeostasis, these energy and material budgets always balance.

Accepted Answer

Hello everyone. Let's look at our next problem. Why do Ecto Therms not need as much food as endo Therms for energy generation. So let's recall from our content videos that Ecto Therms what we often refer to as cold blooded animals so they don't maintain their old body their own body temperature. Their body temperature is regulated by external heat sources. So when we think about their metabolic processes since they don't need to maintain homeostasis and of their body temperature, they need less energy in general they don't need as much energy for that function. So they need less energy. This is an advantage because they can survive in times of low low food supply. So let's look back at our choices to explain why it is. Again they don't need as much food for energy generation. So Choice A. Says because Ecto Therms do not need much energy for their metabolic process and yes that is correct. They need less energy for that. So Choice A. Is a correct description. But let's just go through our other choices here, Choice B says. Because Ecto Therms need to warm their bodies at night to maintain homeostasis. As we said, Ecto Therms do not maintain their body temperature themselves, they at night would get colder due to the colder surroundings. So Choice B. Is incorrect. Choice C. Says because terms are not active in food hunting. No that's not correct. Ecto Therms do hunt food so C. Is eliminated. Choice D. Says because extra terms do not need to invest energy and growth and reproduction. Well pretty much all animals need to invest energy and growth and reproduction. Choice D. Is not correct. So again, choice A. Because X terms do not need much energy for their metabolic process, since they're not needing to maintain their own body temperature. Thanks for watching. See you next time.

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