In which class of Coelenterate, the polyp and medusa both are found in one animal?
None of the above
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Hydrozoa Cnidarians exhibit two basic body forms called polyp and medusa.
The former is a sessile and cylindrical form like Hydra, Adamsia, etc. whereas, the latter is umbrella-shaped and free-swimming like Aurelia or jellyfish.
These Cnidarians, which exist in both forms exhibit alternation of generation (Metagenesis), i.e., polyps produce medusae asexually and medusae form the polyps sexually (e.g., Obelia).
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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
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?
Assertion [A]: Obelia exhibits metagenesis.
Reason [R]: Obelia exists in both polyp and medusa form.
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