Question

.. Write three examples each for the following animal phyla : (1) Coelenterata : (2) Echinodermata : (3) Annelida : (4) Nematoda :​

Answer 1

Answer:

The Phylum Coelenterata consists of marine organisms that have a body that is radially symmetrical and a mouth that has sensory tentacles that help in capturing prey easily. Other animals belonging to the Phylum Coelenterata are hydra, comb jellies, true jellies, sea pens, coral animals, sea anemones and more.

Answer 2

Examples for the given animal phyla:

1. Coelenterata:

• It is a term that encloses the animal phyla Cnidaria (true jellies, coral animals, jellyfish, hydra) and Ctenophora (comb jellies).
• They have hollow body cavities.
• They have radial symmetry (similar parts arranged around a central axis).
• They are aquatic.
• Examples of coelenterates are hydra, comb jellies, and sea anemones.

2. Echinodermata:

• It is a phylum that has exclusively marine animals.
• Radial symmetry is found in the adults of this phylum.
• Echinoderms have a star-like appearance.
• A unique water vascular system is found in Echinoderms.
• Examples of echinoderms are sea stars (starfish), sea urchins, and brittle star.

3. Annelida:

• Another name of annelids is ringworm or segmented worm.
• They have bilateral symmetry, that is, the opposite sides are similar in these species.
• They use their body surface for respiration.
• Some annelids are aquatic while others are terrestrial.
• Examples of annelids are leeches, earthworms, and lugworms.

4. Nematoda:

• This phylum constitutes the roundworms.
• They have bilateral symmetry.
• They are exclusively cylindrical.
• They have a pseudocoelom (fluid-filled cavity).
• Examples of nematodes are Ascaris, hookworms, and whipworms.