Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Textbook Question
Chapter 27, Problem 10RQ
Consulting the modern phylogenetic tree of animals, which of the following would not constitute a clade?
- deuterostomes
- lophotrochozoans
- Parazoa
- Bilateria
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Chapter 27 Solutions
Biology 2e
Ch. 27 - Figure 27.5 If a Hox 13 gene in a mouse was...Ch. 27 - Figure 27.6 Which of the following statements is...Ch. 27 - Figure 27.9 Which of the following statements...Ch. 27 - Which of the following is not a feature common to...Ch. 27 - During embryonic development, unique cell layers...Ch. 27 - Which of the following phenotypes would most...Ch. 27 - Which of the following organisms is most likely to...Ch. 27 - Which of the following is not possible? radially...Ch. 27 - An animal whose development is marked by radial...Ch. 27 - Consulting the modern phylogenetic tree of...
Ch. 27 - Which of the following is thought to be the most...Ch. 27 - As with the emergence of the Acoelomorpha phylum,...Ch. 27 - Which of the following periods is the earliest...Ch. 27 - What type of data is primarily used to determine...Ch. 27 - The time between 542-488 million years ago marks...Ch. 27 - Until recent discoveries suggested otherwise,...Ch. 27 - Plant life first appeared on land during which of...Ch. 27 - Approximately how many mass extinction events...Ch. 27 - Why might the evolution of specialized tissues be...Ch. 27 - Describe and give examples of how humans display...Ch. 27 - How have Hox genes contributed to the diversity of...Ch. 27 - Using the following terms, explain what...Ch. 27 - Explain some of the advantages brought about...Ch. 27 - Describe at least two major changes to the animal...Ch. 27 - How is it that morphological data alone might lead...Ch. 27 - Briefly describe at least two theories that...Ch. 27 - How is it that most if not all, of the extant...
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- Three major phylogenetic groups of Bilateria are currently recognized: Ecdysozoa, Lophotrochozoa, and Deuterostomia. Which of these three groups is least diverse? Where are humans?arrow_forwardFind an animal on the phylogenetic tree and classify it as either ecdysozoa or lophotrochozoan?arrow_forwardCreate a cladogram summarizing the phylogenetic relationships among the different phyla. Phyla: Porifera Cnidaria Platyhelminthes Annelida Mollusca Nematoda Arthropoda Echinodermata Chordata Characters: True tissues Blastopore forms the mouth Blastopore forms anus Undergo ecdysis Notochord Mantle and muscular foot Water vascular system Trochophore Segmented jointed appendages Chitinous setae Muscles and nerves Triploblasticarrow_forward
- To what subphylum does this animal belong? Chordata Vertebrata Agnatha Gnathostomata Elasmobranchiiarrow_forwardWhich of these models correctly identifies the most recent common ancestor diploblasts? Cnidaria ⚫Lophotrochozca Ecdysozoa Deuterostomes Cnidaria Lophotrochozoa Ecdysozoa Deuterostomes Cnidaria •Lophotrochozoa Ecdysozoa Deuterostomes Cnidaria Lophotrochozoa Ecdysozoa Deuterostomesarrow_forwardWhat is the sister group to the Tetrapoda clade?arrow_forward
- Put characteristics on this phylogenetic tree.arrow_forwardGive at least (3) body structures that are salient among these groups of animals: Protozoans Poriferan Cnidariansarrow_forwardFind the animal on the phylogenetic tree and classify it as either metazoan or eumetazoa, diploblastic or triploblastic?arrow_forward
- CE Which of the following is a synapomorphy of the Anthozoa? Exoskeletons of calcium carbonate O Corals and sea anemones Absence of medusa stage Presence of planula larva stage Presence of cnidacarrow_forwardFlatworms have no coelom. Recent gene sequencing shows that their closest relatives are the rotifers and gastrotrichs (which are pseudocoelomate), the bryozoans (which are coelomate), and the entoprocts (which are acoelomate). Which of the following is a legitimate conclusion? Flatworms, rotifers, and gastrotrichs form a monophyletic group. Flatworms and bryozoans form a monophyletic group. Flatworms and entoprocts form a monophyletic group. Bryozoans, rotifers, and gastrotrichs form a monophyletic group. There must be flaws in the gene sequence analyses.arrow_forwardPlease create a cladogram summarizing the phylogenetic relationships among the different Phyla below. PHYLA: Porifera, Cnidaria, Platyhelminthes, Annelida, Mollusca, Nematoda, Arthropoda, Echinodermata, Chordataarrow_forward
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