Exam 27: Diversity of Animals 1: Sponges, Radiata, Platyhelminthes, and Protostomes

Which subphylum is composed mostly of insects?

Which subphylum includes spiders, ticks, mites, scorpions, and horseshoe crabs?

Based on modern molecular phylogeny, which of the following is a derived characteristic within Lophotrochozoa?

Bristle worms are found primarily in marine environments and characteristically have parapodia. Which class do they belong to?

Which phylum includes members that have a body divided into three regions called the visceral mass, head-foot, and mantle?

Which term refers to animals that have a fluid-filled cavity that separates the gut from the muscles of the body wall and which is completely lined by the peritoneum?

Match each phylum with its corresponding organism. Each phylum is used only once. -roundworms

Which subphylum includes shrimp, lobsters, and crabs?

Match each phylum with its corresponding organism. Each phylum is used only once. -jellyfishes, corals, and sea anemones

Which Ecdysozoan phylum includes many important decomposers, but also many damaging plant and animal parasites?

For most metazoans, what is the name of the middle tissue layer during development?

Contrast the typical embryonic development of protostomes and deuterostomes.

Which of the following types of cell cleavage is found most often for protostomes?

Which of the following describes spicules?

Which subphylum includes members that are now all extinct, but which were once extremely numerous in shallow Paleozoic seas?

Which of the following most closely resemble the earliest ancestor of all animals?

Which class includes slugs and snails?

Which embryonic cell layer develops into the lining of the gut in most metazoans?

Which class contains members that, due to their high activity and resulting need for lots of oxygen, have a closed circulatory system?

Which Lophotrochozoan phylum includes members called ribbon worms or proboscis worms, which are found mostly in marine environments?