problem 1:

a) What do you mean by the term endotherm?

b) What word is employed to describe animals which are not endotherms?

c) Propose some advantages of being an endotherm.

problem 2:

The graph exhibits daily variations of human body temperature over 3 days.

a) Determine the maximum range of body temperature under the normal conditions as shown in the graph?

b) At what time each day does body temperature fall to its minimum level?

c) Give a reason for the fall in temperature at the time referred to in (b).

d) Children usually have higher body temperatures than the adults. Propose a reason for this.