The following diagram shows the T.S. of monocot leaf, certain parts have been indicated by alphabets. Select the option in which A, B, C, D, E, F and G have been correctly matched with the parts which they indicate

Options

A. A – Adaxial epidermis, B – Xylem, C – Stoma, D – Sub- stomatal cavity, E – Abaxial epidermis, F – Phloem, G – Mesophyll
B. A – Adaxial epidermis, B – phloem, C – Mesophyll, D – Sub-stomatal cavity, E – Abaxial epidermis, F – Xylem, G – Stoma
C. A – Abaxial epidermis, B – Xylem, C – Mesophyll, D – Sub-stomatal cavity, E – Adaxial epidermis, F – Phloem, G – Stoma
D. A – Adaxial epidermis, B – Xylem, C – Mesophyll, D – Sub-stomatal cavity, E – Abaxial epidermis, F – Phloem, G – Stoma

Answer

D

Explanation

1. Each leaf has upper and lower epidermis made up of single layer of compactly arranged cells called adaxial and abaxial epidermis respectively.
2. The bulk of tissue lying between upper epidermis and lower epidermis except vascular bundle is called mesophyll.
3. The monocot leaves are characterized by possessing parallel venation- each vein comprises of single vascular bundle. Each bundle is conjoint, collateral and surrounded by distinct bundle sheath.
4. Each vascular bundle consists of xylem facing towards upper epidermis and phloem towards lower epidermis. Refer in Book.