Question
Download Solution PDFThe body of the phylum ________ is unsegmented and dorsoventrally flattened.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFKey Points
- The phylum Platyhelminthes consists of organisms that have an unsegmented, dorsoventrally flattened body.
- These organisms are commonly known as flatworms.
- Flatworms exhibit bilateral symmetry and a lack of body cavity (acoelomate).
- Members of this phylum include planarians, flukes, and tapeworms.
- Platyhelminthes have a simple digestive system with a single opening serving as both mouth and anus.
Additional Information
- Coelenterata (also known as Cnidaria) includes organisms like jellyfish and corals that have a radially symmetrical body and a gastrovascular cavity.
- Mollusca consists of soft-bodied animals like snails, clams, and squids, usually with a hard shell made of calcium carbonate.
- Arthropoda is the largest phylum in the animal kingdom and includes insects, arachnids, myriapods, and crustaceans, characterized by a segmented body and jointed appendages.
- The correct answer is option 4) Platyhelminthes.
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