Tissues — Science STD 9 — Question

Selection of crops is done on the basis of:

Which one of the following species of honey bee is an Italian species?

1. Apis Mellifera.
2. Apis Dorsata.
3. Apis florae.
4. Apis Cerana Indica.

In the lung fishes, the heart is:

1. Single chambered.
2. Two chambered.
3. Three chambered.
4. Four chambered.

Which one of the following is cold-blodded animal?

1. Birds.
2. Monkey.
3. Rat.
4. Lizard.

The technique used to obtain variety with high yield and other desirable characters is:

Daytime temperature of moon is:

1. 60°C
2. 70°C
3. 90°C
4. 110°C

Check dams help to reduce soil erosion as:

Cardiac muscle fibres are:

Rajasthan and Gujarat fall under:

1. Semiarid zone.
2. Arid zone.
3. Intermediate zone.
4. Wet zone.

Cell wall of plant cells is chiefly composed of:

1. Hemicellulose.
2. Celluolse.
3. Phospholipids.
4. Proteins.