What type of vascular bundles are found in monocot stem?
Ans :
Which parts are absent in the monocot stem?
Ans:
five two examples of monocot plants?
ns:
Answers
Answer:
Monocot stem vascular bundles are found irregularly scattered in the ground tissue.
In monocot stems, the cambium is absent and xylem and phloem occur in direct contact with each other i.e there is no boundary present between them. There is no pith region in the monocot stem.
The monocot plants have a single cotyledon. They have a fibrous root system, leaves in monocots have parallel venation.
Examples – Garlic, onions, wheat, corn and grass, rice, maize, bamboo, palm, banana, ginger, lilies, daffodils, iris, orchids, bluebells, tulips, amaryllis.
1) Monocot stem vascular bundles are found irregularly scattered in the ground tissue. Towards the periphery, the bundles are smaller in size while towards the centre, they are larger in size. The smaller bundles are younger, while the larger ones are older. Hence, the arrangement is described as centrifugal or endarch.
Each vascular bundle has a covering, called as bundle sheath formed by a single layer of sclerenchyma cells. The vascular bundle encloses both xylem and phloem. Xylem is found towards the inner surface and phloem towards the outer surface. Cambium is absent. Hence, the vascular bundles are described as conjoint, collateral and closed.
2) In monocot stem, the endodermis is absent. It has a single layer epidermis. The vascular bundles are scattered. Thus, the correct answer is option A.
3). The monocot plants have a single cotyledon. They have a fibrous root system, leaves in monocots have parallel venation. Examples – Garlic, onions, wheat, corn and grass, rice, maize, bamboo, palm, banana, ginger, lilies, daffodils, iris, orchids, bluebells, tulips, amaryllis.