List out the external and internal factors that affect photosynthesis.

Explanation

(a) External Factors:
(1) Light (2) Carbon dioxide (3) Temperature (4) Water (5) Mineral
(b) Internal Factors: (1) Pigments (2) Leaf age (3) Accumulation of carbohydrates (4) Hormones
(ii)Vegetative propagation is the only method of multiplication in plants like bana seedless grapes and orange that have lost their capacity to produce seeds through sexual reproduction and vegetative propagation helps us to introduce plants in new areas where seed germination fails to produce plants.