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In leaves, most photosynthesis occurs in the middle cell layer called the:

ACuticle
BMesophyll
CEpidermis
DStomata
Answer & Solution
Correct answer: B. Mesophyll
1. Leaves have several cell layers. 2. The mesophyll holds most chloroplasts. 3. Gas exchange happens through stomata. _Source: OpenStax Biology 2e, Chapter 8, Photosynthesis (CC BY 4.0)._
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