Biology 2e
Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Chapter 27, Problem 10RQ

Consulting the modern phylogenetic tree of animals, which of the following would not constitute a clade?

  1. deuterostomes
  2. lophotrochozoans
  3. Parazoa
  4. Bilateria

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Which of the following most accurately reflects current understanding of phylogenetic relationships in the clade, Ecdysozoa? O Insects are more closely related to barnacles than to scorpions. Nematode worms are more closely related to annelid worms than to millipedes and centipedes. Decapods and myriapods are each other's closest relatives. Pancrustacea includes beetles, crabs, and horseshoe crabs.
Porifera Cnidaria Clenophora Chordata Joo Ecdysis Protostome body plan Loss of coelom Bilateral symmetry Ctenes Hemichordata Pinacocytes 10 Visceral mass Notochord Consider the phylogenetic tree of the 12 metazoan phyla we discussed in class throughout the term. For each of the 8 numbered branches on this tree (numbered 1-10), match a trait (i.e. character) or loss of a trait that occurred along that branch. Echinodermata Deuterostome body plan Proboscis, collar, and trunk body plan 1. 1 2. 2 3. 3 4. 4 5. 5 6. 6 7. 7 8. 8 9. 9 Arthropoda 10, 10 Nemoda Mollusca Annelida Roer Platyhelminthes
Which of these models correctly identifies the most recent common ancestor diploblasts? Cnidaria Lophotrochozoa Ecdysozoa Deuterostomes Cnidaria Lophotrochozoa Ecdysozoa Deuterostomes Cnidaria -Lophotrochozoa Ecdysozoa Deuterostomes Cnidaria Lophotrochozoa Ecdysozoa Deuterostomes

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