The Fundamental Unit of Life — Science STD 9 — Question

Following are a few definitions of osmosis:
Read carefully and select the correct definition:

Find out the correct sentence.

1. Hybridization means crossing between genetically dissimilar plants.
2. Cross between two varieties is called as inter-specific hybridization.
3. Introducing genes of desired characters into a plant gives genetically modified crop.
4. Cross between plants of two species is called as inter varietal hybridization.

1. (i) and (ii)
2. (ii) and (iv)
3. (ii) and(iii)
4. (iii) and (iv)

In the Pila, the gastropod mollusk, the organ of the locomotion is:

1. Mantle.
2. Foot.
3. Tentacles.
4. Legs.

A protozoan disease is:

1. Sleeping sickness.
2. Kala-azar.
3. Malaria.
4. All the above.

Assertion: Cells vary greatly in their shape.
Reason: The shape of cell does not depend on the function they perform.

The botanical name of Dhaincha is:

What made the study of cells possible?

AIDS is mainly caused by:

1. Sexual intercourse.
2. Blood transfusion.
3. Through placental transfusion.
4. All of the above.

Maximum milk yielding buffalo is:

1. Nagpuri
2. Surti
3. Mehsana
4. Murrah

Naked seeds are present in:

1. Pinus.
2. Mango.
3. Mustard.
4. Lemon.