Biology
Assertion (A): Transpiration helps in the descent of sap by producing a suction force acting from the top of a plant.
Reason (R): Transpiration is the evaporative loss of water through the aerial parts (leaves, stems) of a plant. However, this loss holds much significance for the plant.
- Both A and R are True
- Both A and R are False
- A is True and R is False.
- A is False and R is True.
Related Questions
Assertion (A): Transpiration decreases the amount of moisture in the atmosphere.
Reason (R): Forests contribute in bringing rain because of transpiration.
- Both A and R are True
- Both A and R are False
- A is True and R is False.
- A is False and R is True.
Assertion (A): Nerium leaves have sunken stomata covered by trichomes.
Reason (R): Nerium is a hydrophytic plant which gets rid of excessive water through the process of transpiration.
- Both A and R are True
- Both A and R are False
- A is True and R is False.
- A is False and R is True.
Assertion (A): Photosynthesis occurs in all parts of a green plant.
Reason (R): Chlorophyll is the green pigment which traps solar energy during daytime.
- Both A and R are True
- Both A and R are False
- A is True and R is False.
- A is False and R is True.
Assertion (A): Guard cells regulate the opening and closing of the stomatal aperture.
Reason (R): Guard cells contain chloroplasts and are mostly located on the lower surface of the leaves. Other cells of the lower epidermis do not contain chloroplasts.
- Both A and R are True
- Both A and R are False
- A is True and R is False.
- A is False and R is True.