Suppose that a small mainland tortoise and a large island tortoise are placed in the same pen at a zoo. which tortoise will be more poikilothermic, the small or large tortoise?

The big turtle would be more because of it's big body structure and it having more mass for a different body temperature. The small one would be easier to keep the same since it's less mass.

D. when it begins to fall back to the child's handhope i ! > w<

It is called the medulla oblongata or people usually call it medulla. it is the lower half of the brain stem continuous with the spinal cord.