Question

leaf fall from branches i account of
(A)completion of their life cycle
(B)formation of abscission layer
(C)formation of calypterogen
(D)fall in atmospheric temperature

Answer 1

Option B............

Answer 2

Answer:

Leaf fall from branches in account of "(B) formation of abscission layer".

Explanation:

Abscission or leaf abscission is the process by which a plant sheds various parts of it, like leaves, flowers, fruits, bark, etc. When a certain portion of a plant, especially a leaf or a dead leaf, is no longer needed by the plant, or is a burden for the plant, the plant tends to get rid of it by abscission of the leaf. The process of abscission in three steps – Resorption, Formation of a protective layer and Detachment, helps the plant to get rid of the leaf.