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?

<p>A layer of cells forming in the embryo (D)</p> Signup and view all the answers

What is the main difference between diploblastic and triploblastic animals?

<p>Presence of mesoderm (C)</p> Signup and view all the answers

What is the result of cleavage in most animals?

<p>Multicellular stage called a blastula (B)</p> Signup and view all the answers

What is the term for animals lacking a backbone?

<p>Invertebrates (D)</p> Signup and view all the answers

Which superphylum includes Arthropoda and Nematoda?

<p>Ecdysozoa (D)</p> Signup and view all the answers

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

<p>Triploblastic organization (D)</p> Signup and view all the answers

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

<p>Bilateral cleavage (C)</p> Signup and view all the answers

What is the main difference between diploblastic and triploblastic organisms?

<p>The number of germ layers (C)</p> Signup and view all the answers

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

<p>$3^4$ (D)</p> Signup and view all the answers

What is the main function of choanocytes in sponges?

<p>Generating a water current through the sponge (A)</p> Signup and view all the answers

Which phylum lacks true tissues and organs?

<p>Porifera (C)</p> Signup and view all the answers

What is the main body plan variation seen in cnidarians?

<p>Sessile polyp and motile medusa (C)</p> Signup and view all the answers

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

<p>Amoebocytes (D)</p> Signup and view all the answers

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

<p>Tentacles armed with nematocysts (B)</p> Signup and view all the answers

Which phylum among those discussed has members that are hermaphroditic?

<p>Porifera (D)</p> Signup and view all the answers

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