Interrelationship between Plants and Animals

Q. Which of the following is the benefit of blue-green algae?

1. They help in the growth of weeds.
2. They increase the soil pH.
3. They help in the growth of pests or insects.
4. They increase the nitrogen content

Q. Turmeric is used as a cure for arthritis and joint pain.

1. True
2. False

Q. Neem coated urea helps the plants to absorb maximum _______.

1. carbon
2. nitrogen
3. potassium
4. sulphur

Q.

Assertion (A): Indian Scientists made Neem Coated urea which released nitrogen gradualy and helps the plants to absorb maximum nitrogen.
Reason (R): It Increases the impact of urea on an environment.

1. Both A and R are true and R is the correct explanation of A.

2. Both A and R are true but R is NOT the correct explanation of A.
3. A is true but R is false
4. Both A and R are false.

Q.

Which of these fertilizers is essential for the growth of tobacco?

1. Potassium Nitrate

2. Urea

3. Ammonium Sulphate

4. Chloro-phosphate

Q. Soil erosion is relatively more in dense forests as compared to open fields.

1. True
2. False

Q. ___ helps the body to fight foreign invaders.

1. Aloe
2. Amla
3. Turmeric
4. Millet

Q. Soil erosion can be prevented by:

1. afforestation
2. deforestation
3. overgrazing
4. urbanization

Q. Removal of the top layer of the soil is called as ___.

1. deforestation
2. soil erosion
3. weathering
4. soil formation

Q.

Turmeric is used as a cure for arthritis and joint pain.

1. True

2. False

Q.

Does soil erosion affect the fertility of soil? How?