A Levels Biology (9700)•9700/12/M/J/20

Explanation
Xerophytic adaptations visible in leaf transverse section
Steps:
- Locate stomata position: sunken stomata appear recessed below the epidermis surface.
- Inspect outer layer: thick cuticle shows as a prominent waxy coating.
- Count epidermal cells: multiple layers form a thick protective sheath.
- Assess overall shape: small surface area to volume requires 3D view, not 2D section.
Why C is correct:
- Xerophytic leaves feature sunken stomata to trap moist air and multilayered epidermis to reduce water loss, both directly observable in transverse sections per plant anatomy definitions.
Why the others are wrong:
- A: Includes thick cuticle (not visible here) and small surface area (not assessable in 2D).
- B: Includes thick cuticle, which lacks prominence in this section.
- D: Includes small surface area to volume, undetectable in a transverse view.
Final answer: C
Topic: Transport mechanisms
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