Question

Organisms under the phylum ‘Ctenophora’ are also known as _____________.

• A. Roundworms
• B. Comb jellies
• C. Ctenoplana
• D. Flatworms

Answer 1

The correct option is B

Comb jellies

The correct option is B

Explanation of the correct option :

1. Comb jellies are members of the phylum Ctenophora.
2. Ctenophores are gelatinous marine planktons that can swim with the help of cilia.
3. Comb jellies are free-swimming, transparent, jelly-like, soft-bodied, marine animals having comb-like ciliary plates for locomotion. Examples: Pleurobrachia.

Explanation of the incorrect option :

Option A:

1. Nematodes are known as roundworms.
2. They have bilateral symmetry and are triploblastic and pseudocoelomates.
3. They can be aquatic, free-living, and parasitic. Ascaris and Wuchereria are examples of roundworms.

Option D:

1. Platyhelminthes are also known as flatworms and have dorsoventrally flattened bodies.
2. They have bilateral symmetry and are triploblastic and acoelomate animals.
3. They are either free-living or parasitic. Fasciola and taenia are flatworms.

Final answer: Organisms under the phylum ‘Ctenophora’ are also known as comb jellies.