BOTANY

Detailed explanation-1: -So, the correct answer is ‘Caruncle’ .

Detailed explanation-2: -The caruncle is a structure present in the micropylar region of Euphorbiaceae seeds. This structure has the ecological function of promoting seed dispersal by ants (myrmecochory), but it is debated whether it also has an agronomical importance influencing seed germination.

Detailed explanation-3: -Caruncle is a white spongy bilobed outgrowth present near the narrow end of the castor seed. If partially covers the hilum (dark scar) and completely covers the micropyle (small pore). It absorbs water which percolates through the micropyle into the seed. So, the correct answer is ‘Caruncle’.

Detailed explanation-4: -The spongy outgrowth of the integument near the micropyle is the caruncle The principal objective of the caruncle is to absorb water that is critical to germination. Castor seeds are an example of a seed containing a caruncle.

Detailed explanation-5: -It is called the micropyle. It is involved in the seed processing of the plant. The third integument is also known as ariel.