Improvement in Food Resources — Science STD 9 — Question

The mass of moon is about 0.012 times that of earth and its diameter is about 0.25 times that of earth. The value of G on the moon will be:

1. Less than that on the earth.
2. More than that on the earth.
3. Same as that on the earth.
4. About one-sixth of that on the earth.

Binomial nomenclature consists of two words:

1. Genus and species.
2. Order and family.
3. Family and genus.
4. Species and variety.

The method of incorporating desirable qualities in crop varieties is:

The mass number of two atoms X and Y is the same (40 each) but their atomic numbers are different (being 20 and 18 respectively). X and Y are examples of:

1. Chemically similar atoms.
2. Isotopes.
3. Solid and liquid metals.
4. Isobars.

Crop rotation results in:

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

The smell of the deodorant sprayed  on one side of the room travels to the other side of the room.This proves that:

Fats are stored in human body as:

Percolation tanks and wells are used for:

1. Irrigation.
2. Harvesting of flood water.
3. Supply of drinking water.
4. All the above.

Each cell of unicelluler organism performs certain functions such as _________.