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Animal Synapormorphies Quiz

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Questions and Answers

What is the main distinguishing feature of the choanoflagellate ancestral cadherinlike protein?

Epithelia domain

Collagen domain

Nerves domain

CCD domain (correct)

Which groups of animals, in addition to choanoflagellates, exhibit collar cells similar to those in animals?

Cnidarians, flatworms, and echinoderms (correct)

Annelids, mollusks, and arthropods

Ctenophores, sponges, and cnidarians

Platyhelminthes, nematodes, and poriferans

What is the main function of cadherins in animal cells?

DNA sequencing

Neurotransmission

Protein synthesis

Cell attachment (correct)

In animals, what is a germ layer?

A layer of cells forming in the embryo Signup and view all the answers

What is the main difference between diploblastic and triploblastic animals?

Presence of mesoderm Signup and view all the answers

What is the result of cleavage in most animals?

Multicellular stage called a blastula Signup and view all the answers

What is the term for animals lacking a backbone?

Invertebrates Signup and view all the answers

Which superphylum includes Arthropoda and Nematoda?

Ecdysozoa Signup and view all the answers

What is the characteristic shared by Metazoa, Eumetazoa, Bilateria, Deuterostomia, Lophotrochozoa, and Ecdysozoa?

Triploblastic organization Signup and view all the answers

Which type of cleavage is characterized by spiral/determinate and radial/indeterminate patterns?

Bilateral cleavage Signup and view all the answers

What is the main difference between diploblastic and triploblastic organisms?

The number of germ layers Signup and view all the answers

Which category does not belong to Porifera, Cnidaria, Nematoda, Platyhelminthes, Annelida, or Echinodermata?

$3^4$ Signup and view all the answers

What is the main function of choanocytes in sponges?

Generating a water current through the sponge Signup and view all the answers

Which phylum lacks true tissues and organs?

Porifera Signup and view all the answers

What is the main body plan variation seen in cnidarians?

Sessile polyp and motile medusa Signup and view all the answers

Which cell type in sponges plays a role in digestion and structure?

Amoebocytes Signup and view all the answers

What is the primary method used by cnidarians to capture prey?

Tentacles armed with nematocysts Signup and view all the answers

Which phylum among those discussed has members that are hermaphroditic?