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Phylum Cnidaria Overview

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Questions and Answers

What is the main difference between polyp and medusa body forms in Cnidaria?

Polyps reproduce sexually by gametes, whereas medusas reproduce asexually by budding.

Polyps have a cylindrical body with a long stalk, whereas medusas have an umbrella-shaped body with a reduced stalk.

Polyps are free-swimming while medusas are attached to rocks.

Polyps have a complex gastrovascular cavity with radial and circular canals, while medusas have a simple gastrovascular cavity. (correct)

Which class of Cnidaria always has the polyp body form?

Medusozoa

Hydrozoa

Scyphozoa

Anthozoa (correct)

What is the key feature of the gastrovascular cavity in medusas?

Simple structure with radial and circular canals

Lack of radial or circular canals (correct)

Presence of four gonads on radial canals

Asexual reproduction by budding

In which class of Cnidaria do symptoms like burning, itching, and numbness occur?

Scyphozoa Signup and view all the answers

What is the purpose of the long stalk present in polyps?

Protection against predators Signup and view all the answers

Which body form in Cnidaria is more concerned with sexual reproduction?

Polyp Signup and view all the answers

What are the typical symptoms associated with Scyphozoa class in Cnidaria?

Nausea, vomiting, and throbbing pain Signup and view all the answers

Which body form in Cnidaria involves a more complex reproductive process?

Polyp Signup and view all the answers

What distinguishes the reproductive process between polyps and medusas in Cnidaria?

Polyps reproduce sexually by gametes, while medusas reproduce asexually by budding. Signup and view all the answers