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Phylum Cnidaria

Distinguish b...

Question

Distinguish between polyp and medusa.

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Solution

Polyp Medusa

It is the non-motile form of cnidarians. It is the free-swimming or motile form of cnidarians.

It has a cylindrical body. It has an umbrella-like body.

It reproduces asexually. It reproduces by sexual reproduction.

Examples: sea pen, red coral Examples: Jellyfish, Rhizostoma

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Q. Give one significant difference between polyps and medusa

Q. Find out the incorrect statement(s).

I. Polyp is sessile and cylindrical like Adamsia

II. Medusa is umbrella shaped and free-swimming like Aurelia

III. Polyps produce medusae sexually and medusae form the polyps asexually

IV. Medusae produce polyps sexually

Q. Polyps and medusae are similar in which one of the following context?

Q. Which of the following statements regarding coelenterates are wrong?
I. Cnidocytes are present on the tentacles and on the body
II. They are diploblastic and have cellular level of organisation
III. Polyp forms are free-swimming
IV. They exhibit metagenesis
V. Polyps produce medusae sexually and medusae form polyps asexually

Q. Consider the following statements during the alternation of generation or metagenesis in dimorphic cnidarians, the polyps are:
(1) Sedentary
(2) Free living
(3) Polyp forms the medusa sexually
(4) Polyp forms the medusa asexually
Which of the following given statements are correct?

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