Q3. Assertion: the opaque-covered part of an initially destarched leaf makes no new starch during light exposure. Reason: light is required for photosynthesis. Are both true, and does the reason explain the assertion?
Both are true, and the reason explains the assertion (NCERT page 133).
Q4. What are organisms that depend on green plants for food called?
Heterotrophs (NCERT page 133).