Suppose that a small mainland tortoise and a large island tortoise are placed in the same pen at a zoo. which tortoise will experience greater variation in body temperature over a 24 hr period, the small or large tortoise?

Both small mainland tortoise and large island tortoise placed in same pen at zoo will not experience any greater variation in body temperature over a 24 hr period.  

Explanation:

It is because they are ambient in nature which means that their body temperature remains unchanged with responds to the environment. At 13℃ the tortoise are inactive and during this temperature any variation is not seen in the body temperature of the tortoise and it is same for both big as well as small tortoise.

i believe it would be the lungs.

starchy vegetables are high in carbohydrates.

starchy vegetables contain more carbohydrates than non-starchy vegetables.

explanation:

there are two primary categories of carbohydrates, essentially differentiated on the basis of their carbohydrate content (which is in the form of starch - a complex carbohydrate):

those vegetables which contain little amounts of starch are termed as non-starchy vegetables, and some examples include: artichokes, broccoli and bean sprouts.

vegetables high in their starch content are distinguished as starchy vegetables, and some examples include: potatoes, chickpeas and corn.