the Mollusca phylogenetic tree below, circle the node that corresponds to the latest common ancestor of Scaphopoda and Gastropoda. Label it “A” In the same tree, circle the clade that includes Bivalvia and Cephalopoda. Label it “B”.
the Mollusca phylogenetic tree below, circle the node that corresponds to the latest common ancestor of Scaphopoda and Gastropoda. Label it “A” In the same tree, circle the clade that includes Bivalvia and Cephalopoda. Label it “B”.
Human Anatomy & Physiology (11th Edition)
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Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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In the Mollusca phylogenetic tree below, circle the node that corresponds to the latest common ancestor of Scaphopoda and Gastropoda. Label it “A” In the same tree, circle the clade that includes Bivalvia and Cephalopoda. Label it “B”.
](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fe259be8c-12b5-40c3-b3d9-8065c10d29cd%2Fd8678ecf-0ace-46c1-8604-98d1c1b1f26c%2Fpbcbdb_processed.jpeg&w=3840&q=75)
Transcribed Image Text:### Mollusca Phylogenetic Tree
This diagram represents the phylogenetic relationships within the Mollusca phylum, classified under Lophotrochozoa.
1. **Bivalvia**: Includes species such as scallops, clams, and mussels.
2. **Monoplacophora**: Known for "limpet-like" living fossils.
3. **Gastropoda**: Comprises snails, slugs, limpets, and sea hares.
4. **Cephalopoda**: Encompasses squids, octopuses, nautilus, and ammonites.
5. **Scaphopoda**: Characterized by tusk shells.
6. **Aplacophora**: Consists of spicule-covered, worm-like animals.
7. **Polyplacophora**: Includes chitons.
These groups illustrate the diversity and evolutionary relationships within mollusks. The diagram links these groups to their shared ancestry, highlighting the evolutionary branching within the phylum.
Reference: [UCMP Berkeley - Mollusca Classification](http://www.ucmp.berkeley.edu//taxa/inverts/mollusca/mollusca.php)
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Common ancestor point is that point in the evolutionary tree from where branching occurs.
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