Distinguish between phyla Cnidaria and Ctenophora. Outline five characteristics of annelids.
Understand the Problem
The question is asking to differentiate between the phyla Cnidaria and Ctenophora, as well as to outline characteristics of annelids, which requires knowledge of zoology and the specific characteristics of these invertebrate groups.
Answer
Cnidaria have radial symmetry and nematocysts. Ctenophora have biradial symmetry. Annelids are segmented.
Cnidaria have radial symmetry, tentacles with nematocysts, and undergo a polyp stage. Ctenophora have biradial symmetry and lack a polyp stage. Annelids are segmented, have a well-developed coelom, closed circulatory system, setae for movement, and are bilaterally symmetrical.
Answer for screen readers
Cnidaria have radial symmetry, tentacles with nematocysts, and undergo a polyp stage. Ctenophora have biradial symmetry and lack a polyp stage. Annelids are segmented, have a well-developed coelom, closed circulatory system, setae for movement, and are bilaterally symmetrical.
More Information
Cnidarians and ctenophores share some superficial similarities but differ in key aspects such as symmetry, presence of nematocysts, and structural organization.
Tips
Avoid confusing the symmetry types between the phyla.
Sources
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