The Fundamental Unit of Life — Science STD 9 — Question

The nuclei of meristematic cells are:

1. Small
2. Large
3. Medium sized
4. None of these

First living cells were observed by:

1. A. V. Leeuwenhoek.
2. Robert Hooke.
3. R. Virchow.
4. Robert Bworn.

Animal husbandry is the scientific management of:

1. Animal breeding.
2. Culture of animals.
3. Animal livestock.
4. Rearing of animals.

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

Reproductive structure are flowers in:

1. Gymnosperms.
2. Pteridophytes.
3. Angiosperms.
4. Both (a) and (b).

Find out the correct sentence about manure:

1. Manure contains large quantities of organic matter and small quantities of nutrients.
2. It increases the water holding capacity of sandy soil.
3. It helps in draining out of excess of water from  clayey soil.
4. Its excessive use pollutes environment because it is made of animal excretory waste.

Percolation tanks and wells are used for:

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

Which one of the following is the fastest growing carp?

1. Rohu
2. Catla
3. Mrigal
4. Singhara