Question

The parts which are not seen in stems of sugar
cane is/are
A) Endodermis B) Pericycle
C) Medulla D) Hypodermis
E) Cortex F) Cambium
G) Cuticle
1) E, F & G 2) A, B, C,E & F
3) A, B, C & D 4) A, B & G

Answer 1

Answer:

The given figure shows the transverse section of the dicotyledonous stem. The epidermis is the outermost protective layer of the stem and it is covered with a thin layer of cuticle. The multiple layers arranged between the epidermis and pericycle constitute the cortex regions. 

Cortex is composed of three layers hypodermis, cortical cells, endodermis. The innermost layer is called the endodermis. The cells of the endodermis are rich in starch and cells have deposition of water-impermeable waxy material called suberin.  Vascular bundles are arranged in the ring. 

The pericycle is the outermost covering of stele, it is represented by a few layers compactly arranged sclerenchymatous cells.

Answer 2

2) A, B, C,E & F is the correct answer.

• Sugar cane belongs to the category of monocots.
• General constituents of monocot stems are - epidermis, ground tissue and vascular bundles.
• Detailed structure of monocot stems, from outer to inner part, will contain - cuticle, epidermis, hypodermis, cholenchyma.
• Ground tissue contains vascular bundles.
• Vascular bundles contain phloem, metaxylem, protoxylem and bundle sheath.