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In a dorsiventral dicot leaf, which mesophyll layer has elongated, tightly packed cells rich in chloroplasts?
ASpongy parenchyma
BPalisade parenchyma
CBundle sheath
DLower epidermis
Answer & Solution
Correct answer: B. Palisade parenchyma
1. The mesophyll of a dicot leaf is split into palisade and spongy parenchyma.
2. Palisade parenchyma lies just below the upper epidermis with elongated cells and many chloroplasts.
3. These cells lack intercellular spaces and carry out photosynthesis.
4. Spongy parenchyma has loosely arranged cells with air spaces for gaseous exchange, so it is the trap.
_Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 12 Plant Anatomy and Plant Physiology "Internal Structure of Dicot Leaf", p.186_
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