Assertion(A): Loss of water as tiny drops along the margins of the tips of leaves, especially in the early morning is called guttation.

Reason: Excessive root pressure is responsible for guttation.

1. Both A and R are true
2. Both A and R are false
3. Ais true and R is false
4. A is false and R is true

Which one of the following does not affect the rate of transpiration?

1. Light
2. Wind
3. Age of the plant
4. Humidity

Harish was fond of eating dryfruits. He put some raisins in the water for 5-6 hours. After few hours, the raisins were all swelled up. This was due to

1. endosmosis
2. exosmosis
3. osmoregulation
4. no osmosis

Acid rain is caused by a

1. SO₂, SO₃
2. SO₂, CO
3. CO, NH₃
4. SO₂, NO₂