The Fundamental Unit of Life — Science STD 9 — Question

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.

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

Organisms such as lichens are very sensitive to the level of ___________ in the atmosphere.

1. Carbon dioxide.
2. Sulphur dioxide.
3. Carbon monoxide.
4. Methane.

Seat of photosynthesis is:

1. Leuciplast
2. Chloroplast
3. Chromoplast
4. Both a and c

Describe water cycle?