Question

23 Aplant was kept in a dark room for a week.When its leaves were tested with iodinesolution, it did not show the presence ofstarch. From this experiment we canconclude that -------- is essential for
photosynthesis.
(A) Sunlight
(B) Oxygen
(C) Carbondioxide
(D) Water​

Answer 1

Answer:

sunlight

Explanation:

hope you understand

Answer 2

Sunlight is the correct option.

Explanation:

Plants require energy from the sun which is absorbed by the chlorophyll in them. This energy is used to synthesise/make starch. As there is no starch present, sunlight is essential for plants for photosynthesis