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Openings in a leaf that allow gas exchange are called:

AStamina
BStanchions
CStomata
DStigmata
Answer & Solution
Correct answer: C. Stomata
1. Carbon dioxide enters through them. 2. Oxygen and water vapour leave. 3. Those openings are stomata. _Source: OpenStax Biology 2e, Chapter 30, Plant Form and Physiology._
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