A) 1 - Adaxial epidermis, 2 - Xylem, 3 - Mesophyll, 4 - Sub-stomatal cavity, 5 - Abaxial epidermis, 6 - Stoma, 7 - Phloem
B) 1 - Adaxial epidermis, 2 -Abaxial epidermis, 3 - Xylem, 4 - Sub-stomatal cavity, 5 - Stoma, 6 - Mesophyll, 7 - Phloem
C) 1 - Adaxial epidermis, 2 - Phloem, 3 - Mesophyll, 4 - Sub-stomatal cavity, 5 - Abaxial epidermis, 6 - Xylem, 7 - Stoma
D) 1 - Adaxial epidermis, 2 - Xylem, 3 - Stoma, 4 - Sub-stomatal cavity, 5 - Abaxial epidermis, 6 - Phloem, 7 - Mesophyll
Correct Answer: A
Solution :
[a] In the given figure of monocot leaf, the structure marked as 1,2, 3, 4, 5, 6 and 7 are respectively adaxial epidermis, xylem, mesophyll, sub-stomal cavity, Abaxial epidermis, stoma and phloem. Monocot leaf (isobilateral) is somewhat similar to dorsiventral leaf in having epidermis, cuticle, and mesophyll cells. Stomata are present on both the surfaces of epidermis. Mesophyll cells are undifferentiated into palisade and spongy parenchyma. Vascular bundles are conjoint, collateral, closed with phloem towards lower side and xylem towards upper side.
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