Question

Comb plates are found in?

• A. Adamsia
• B. Pleurobrachia
• C. Aurelia
• D. Nereis

Answer 1

The correct option is B

Pleurobrachia

The correct option is B.

Explanation of the correct option:

1. Pleurobrachia is the organism in which comb plates are found.
2. They belong to the phylum Ctenophora.
3. These members are exclusively marine and have radial symmetry.
4. They have tissue-level organization and the body has 8 external rows of ciliated comb plates.
5. These comb plates help in locomotion.

Explanation of the incorrect options:

Option A:

1. Adamsia belongs to the phylum Coelenterata.
2. It has a polyp form and is sessile and has a cylindrical body.
3. Comb plates are not found in them.

Option C:

1. Aurelia belongs to the phylum Coelenterata.
2. It has a medusa form.
3. They are free-swimming.
4. Comb plates are not found on them.

Option D:

1. Nereis belong to the phylum annelida.
2. It is dioecious and is aquatic.
3. They have circular and longitudinal muscles that help in locomotion.
4. Comb plates are not found in them.

Final answer:

Comb plates are found in Pleurobrachia.