From your textbook review questions. Members of Chondrichthyes are thought to be descended from fishes that had ________. a cartilaginous skeleton a bony skeleton mucus glands slime glands

From your textbook visual connections questions. Which of the following statements about the anatomy of a mollusk is false? Mollusks have a radula for grinding food. A digestive gland is connected to the stomach. The tissue beneath the shell is called the mantle. The digestive system includes a gizzard, a stomach, a digestive gland, and the intestine.

From your textbook visual connections questions. Which of the following statements about diploblasts and triploblasts is false? Animals that display radial symmetry are diploblasts. Animals that display bilateral symmetry are triploblasts. The endoderm gives rise to the lining of the digestive tract and the respiratory tract. The mesoderm gives rise to the central nervous system.

From your textbook review questions. The rhynchocoel is a ________. circulatory system fluid-filled cavity primitive excretory system proboscis

From your textbook review questions. The embryonic development in nematodes can have up to __________ larval stages. one two three four

From your textbook review questions. Cubozoans are ________. polyps medusoids polymorphs sponges

From your textbook visual connections questions. Which of the following consist of prokaryotic cells? bacteria and fungi archaea and fungi protists and animals bacteria and archaea

From your textbook review questions. Which of the following is not possible? radially symmetrical diploblast diploblastic eucoelomate protostomic coelomate bilaterally symmetrical deuterostome

From your textbook review questions. Which of the following periods is the earliest during which animals may have appeared? Ordovician period Cambrian period Ediacaran period Cryogenian period

From your textbook review questions. Most sponge body plans are slight variations on a simple tube-within-a-tube design. Which of the following is a key limitation of sponge body plans? Sponges lack the specialized cell types needed to produce more complex body plans. The reliance on osmosis/diffusion requires a design that maximizes the surface area to volume ratio of the sponge. Choanocytes must be protected from the hostile exterior environment. Spongin cannot support heavy bodies.