Chapter 22, Problem 4MC

Which of the following statements is untrue? Roughage takes a long time to digest Birds eat large quantities at one time so that they can fly long distances Cows do not have upper teeth In pseudo-ruminants, roughage is digested in the cecum.

Flatworms digest food ___________ a. inside their cells c. in a gastrovascular cavity b. in a gizzard d. in a complete digestive tract

An open circulatory system (a) is characteristic of squids and other active mollusks (b) permits contracting muscles to recover quickly (c) has no blood vessels (d) is a unique characteristic of annelids (e) has hemolymph, which bathes tissues directly