English Medium कक्षा ९ - CBSE Question Bank Solutions for Science

Write down four general characters of phylum Echinodermata. Give two examples.

Name the phylum in which ambulacral system is present. What is its function?

What are adaptations in fishes due to which they are aquatic?

Write down four characters of Chondrichtyes. Give two examples.

Write down four characters of Osteichtyes and give two examples.

What are differences between the following :

(a) Cartilaginous fishes and bony fishes ;

(b) Amphibia and Reptilia ;

(c) Aves and mammals.

Write down four main characters of chordates.

Write down four characters of mammals. Give two examples.

Describe some flight adaptations of the birds.

Write short note on protochordates.

Give an example each of Urochordata and Cephalochordata.

Give one point of difference between notochord and nerve cord.

Distinguish between Nonchordata and Chordata.

How do animals of Porifera differ from animals of Cnidaria?

Distinguish between polyp and medusa.

Write down four general characters of Porifera. Give two examples.

Write down four general characters of cnidarians (coelenterates). Give two examples.

Explain general characteristics of phylum Platyhelminthes and Nematoda. Give two examples of each.

Describe general characteristics of phylum Annelida. Give one example each class of Annelida.

Explain the general charaters of phylum Mollusca. Give one example of following classes of Mollusca;

(i) Gastropoda;

(ii) Pelecypoda;

(iii) Cephalopoda.