What are the deep folds in the wall of the stomach?

Biological                describes the role of an organism in an ecosystem.

What digestive system secretion facilitates fat emulsification (making it more water soluble)?

Which of the following nervous system structures is a part of the peripheral nervous system?

Goblet cells in the trachea secrete mucus.

Autotrophs can synthesize organic matter from inorganic matter.

What is the main purpose of villi and microvilli in the small intestine?

Which type of bone contains marrow?

The process of breathing (inhaling and exahaling) is called:

                   make up the greatest proportion of the biomass in nearly all ecosystems.