Answer:
Rugae
Explanation:
These are the inner folds of the stomach. The folds are pronounced in an empty stomach that is not yet distended by food. They also increase the surface area in which the food is in contact with digestive enzymes produced by the stomach walls.
Living in herd is a structural adaptation.
There are three different kinds of adaptations: behavioural, physiological and structural.
Adaptations help animals survive and their ecosystem.
The second sentence does not sound correct but it seems correct to me (just not in grammar).
Hope it helped!
I think it’s less complex because it’s made up of only monosaccharides
