Animals need two types of organic precursors from their food, __________, to serve as the raw materials for the synthesis of larger organic molecules.

Minnows are mainly carnivorous, eating insects and other small animals. However, herbivory has evolved independently in minnows several times. What changes in digestive structure and function are associated with the evolution of herbivory?Which minnows, herbivorous or carnivorous, should exhibit higher cellulase activity in the gut? Explain.

Minnows are mainly carnivorous, eating insects and other small animals. However, herbivory has evolved independently in minnows several times. What changes in digestive structure and function are associated with the evolution of herbivory?Why did the researchers compare relative gut length instead of absolute gut length?

Which food items are typical of an herbivorous diet?

Which of the following is acquired outside of an animal's diet?

A breakfast cereal advertises that it contains essential vitamins and minerals. In this context, the word essential means __________.

Which of the following are considered essential nutrients: (1) certain carbohydrates, (2) certain fatty acids, (3) certain amino acids, and/or (4) cholesterol?

In general, B vitamins function in your body as __________.

B vitamins should be consumed daily, but vitamin A can be consumed more sporadically. Why is this true?