In some animal groups, the body is found to be divided into compartments with at least some organs/organ repeated. Name this characteristic feature.

1

(a)

It is the segmentation that simultaneously divides body both externally and internally and is also called metamerism.

Name two non-chordate phyla, where animals are radially symmetrical.

1

(a)

Cnidaria and Echinodermata

What kind of body scales are present in bony

1

(a)

Ctenoid or cycloid scales

What are coelomates? Give two examples.

1

(a)

Animals possessing coelom are called coelomates, e.g, annnelids, molluscs, arthropods, etc.

Which animals have notochord?

1

(a)

Chordates

List out the different exoskeletal structures present in different animals.

2

(a)

Define the terms amphids and phasmids found in Aschelminthes.

2

(a)

What is the difference between direct and indirect development?

2

(a)

Write an account on modes of respiration in animals with examples.

3

(a)

Write an account on skeleton of sponges.

3

(a)

Why molluscs are considered advanced over annelids?

3

(a)

List out various excretory organs in different animals

5

(a)

Write an account of general features of roundworms.

5

(a)