BI-2051
Leaf structure
Biology · Secondary 4 · Medium · Leaf structure
The diagram of a leaf cross-section shows tightly packed column-shaped cells near the upper surface and loosely packed cells with large air spaces below.
Which statement correctly matches these regions with their main roles?
Which statement correctly matches these regions with their main roles?
- Upper region: palisade mesophyll for light absorption; lower region: spongy mesophyll for gas exchange.
- Upper region: spongy mesophyll for gas exchange; lower region: palisade mesophyll for light absorption.
- Both regions are palisade mesophyll for gas exchange only.
- Both regions are epidermis for protection only.
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