Try it on paper first. A hint, the key idea and the worked solution are here when you need them.
The body temperature of four animals was measured on a cold day and on a hot day.
Animal P: and when the air was and .
Animal Q: and when the air was and .
Animal R: and when the air was and .
A regulator keeps its body temperature steady, and a conformer has the temperature of its surroundings. Beyond its limits, a regulator conforms. A bear hibernates in winter. Some snails and fish aestivate in summer. Zooplankton enter diapause. Cranes migrate. A very small body loses heat fast.
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Step 1. (a) Animal Q has the same body temperature, , on both days. It is a regulator.
Step 2. (b) The body temperatures of P and R are within of the air on both days. They are conformers.
Step 3. (c) Birds and mammals.
Answer: (a) Q; (b) P and R; (c) birds and mammals.
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