Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): Leaves of plants are green.
Reason (R): Plants contain chromoplasts the green pigment.
In the light of the above statements, choose the most appropriate answer from the options given below:
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → (A) is correct, but (R) is not correct
The colour of a plant part comes from the pigment in its plastids: chloroplasts hold the green pigment chlorophyll, while chromoplasts hold yellow, orange and red pigments.
Assertion (A): Leaves of plants are green. Correct. The cells of a leaf are packed with chloroplasts, whose chlorophyll absorbs red and blue light for photosynthesis and reflects green light, so the leaf looks green.
Reason (R): Plants contain chromoplasts the green pigment. Incorrect. Chromoplasts are not a pigment but plastids, and they carry carotenoids, the yellow, orange and red pigments of ripe tomatoes, carrots and many petals. The green pigment is chlorophyll, held in chloroplasts.