Tissues — Science STD 9 — Question

The skin is devoid of scales in:

1. Cartilaginous fish.
2. Bony fishes.
3. Reptiles.
4. Amphibians.

Which is the following is known as “physical basis of life”?

1. Gene.
2. Protoplasm.
3. Nucleolus.
4. Mitochondria.

Mammals:

1. Lay eggs.
2. Possess body hair.
3. Have a skin with scales.
4. All the above.

Amoeba has a contractile vacuole for:

1. Osmoregulation.
2. Storage.
3. Turgidity.
4. Gaseous exchange.

Whidr of the following cells is found in the cartilaginous tissue of the body?

Inland fisheries is referred to:

The growing two or more crops at a time in a field is called as:

_________ is necessary for the maximum and judicious use of water:

Each cell has a dense double membrane bounded structures inside it is called as:

_____ is the basic unit of life.