The is an alternative system for classifying carbohydrate-containing foods.

Carbohydrates glycaemic index (GI)

Glycemic index estimates carbohydrates containing food based on how they increase the glucose in the body. Foods are rated by comparing them to a reference food. Foods with high glycaemic index increases blood glucose than foods with average or low glyceamic index.  When taking foods with high GI, low GI foods should be combined with it in order to balance the meal. Examples of low GI foods are corn, most fruits, and yam. Medium GI foods include pita bread and whole wheat. Puffed rice, instant oatmeals are examples of foods with high GI.

the answer is d.) homologous; have mammary glands

this would be called the responsiveness