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

Based on molecular analysis, which of the following appears to be least meaningful for inferring animal phylogenic relationships?

Which subphylum includes centipedes and millipedes?

Match each phylum with its corresponding organism. Each phylum is used only once. -chitons, snails, slugs, and scallops

Match each phylum with its corresponding organism. Each phylum is used only once. -spiders, insects, shrimp, and crabs

Which subphylum includes members that have a three-part body plan that comprises a head, a thorax, and an abdomen?

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

Which phylum is a member of the Radiata?

Which class is made up of members commonly called chitons?

Which Lophotrochozoan phylum includes members that have highly segmented bodies with many repeating units that are usually separated by transverse partitions called septa?

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

Which term refers to an animal that is unable to undergo locomotion under its own power?

What helps maintain a constant flow of water through sponges?

Which of the following is the developing gut for most animal embryos?

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

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

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

Which members of a Lophotrochozoan phylum are acoelomate and dorsoventrally flattened, and lack circulatory or respiratory systems?

For most animal embryos, what is the name of the initial opening between the developing gut and the outside environment?

What is the name of the main embryonic cell layer from which the nervous system is derived in most metazoans?

What is the name of the paired excretory organs found in most body segments of segmented worms?