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प्रश्न
Give an account on phylum Annelida.
संक्षेप में उत्तर
उत्तर
- The animals in phylum annelida are segmented worms.
- Example: Earth worms, Leeches and a group of marine worms.
- Segmented body shows metamerism which means the property of having repeated homologous organs in each segment.
- The animals possess body cavity called coelom.
- Some organisms show movable bristles called setae.
- They have no legs and no hard skeleton.
- The body is covered by moist outer cuticle.
- A thick multi-layered structure, outside the epidermis provides protection.
- They have a central nervous system with a brain.
- Metabolic wastes are removed by Nephridia.
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संबंधित प्रश्न
Label the following.
Re-write the statement by selecting the appropriate option.
Due to which similar characteristic honey bee and cockroach are included in the same phylum?
Find an odd one out.
Give scientific reason.
Earthworm is said to be a farmer’s friend.
State whether true or false. If false, correct the statement.
Trachea are the respiratory organ of Annelida.
Name the following:
A phylum that has hermaphrodite animals.
Metamerism is the characteristic of
Triploblastic, metamerically segmented and coelomate animals are found in
Match List - I with List - II.
| List I | List II | ||
| (a) | Metamerism | (i) | Coelenterata |
| (b) | Canal system | (ii) | Ctenophora |
| (c) | Comb plates | (iii) | Annelida |
| (d) | Cnidoblasts | (iv) | Porifera |
Choose the correct answer from the options given below.
Give a scientific reason.
Why is earthworm called farmer's friend?
