Question 3
Photosynthesis takes place only inside plant leaves. Is this true?
The right answer is the one marked above.
False — it takes place wherever cells contain chlorophyll, including in green stems. Chapter 1 told you that the collenchyma of young dicotyledonous stems contains chloroplasts and carries out photosynthesis.
This is statement 2(iii) of the chapter exercise. Roots are the wrong answer for the opposite reason — they are underground and have no chlorophyll.