You Are Studying a Large Tropical Reptile That Has a High

question 6

Multiple Choice

You are studying a large tropical reptile that has a high and relatively stable body temperature. How do you determine whether this animal is an endotherm or an ectotherm?

• A) You know from its high and stable body temperature that it must be an endotherm.
• B) You subject this reptile to various temperatures in the lab and find that its body temperature and metabolic rate change with the ambient temperature. You conclude that it is an ectotherm.
• C) You note that its environment has a high and stable temperature. Because its body temperature matches the environmental temperature, you conclude that it is an ectotherm.
• D) You measure the metabolic rate of the reptile, and because it is higher than that of a related species that lives in temperate forests, you conclude that this reptile is an endotherm and its relative is an ectotherm.

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Definitions:

After-Tax Net Income

The profit remaining after all operating expenses, including taxes, have been deducted from total revenue.

Annual Investment

The amount of money invested in a particular asset or project on a yearly basis.

Time Value

The concept that money available in the present is worth more than the same amount in the future due to its earning capacity.

Payback Period

A way to determine the duration required for an investment to reach a point where returns equal the costs, providing a simple tool for evaluating project viability.