Which food items are typical of an herbivorous diet?

SCIENTIFIC THINKING Consider the relationship between ­correlation and causation with respect to some pairs of human traits. For example, are freckles and red hair correlated? Is there causation? How does this concept relate to the study of human nutrition? Can you name examples of correlation in humans with respect to obesity? Explain each answer.

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?Suggest a function of the difference in relative gut lengths of herbivorous and carnivorous minnows.

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

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

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?