NEET BIOLOGY

Detailed explanation-1: -The coconut is a drupe or a fleshy fruit having hard lignified stone derived from the wall of the ovary. The seed coat is thus not thin, but membranous and tough.

Detailed explanation-2: -So, the correct answer is ‘Coconut’.

Detailed explanation-3: -In gram, the outer seed coat is thick and strong and the inner coat is thin and membranous. In maize, the seed coat is membranous and generally fused with the fruit wall.

Detailed explanation-4: -In coconut brown covering (thin layer) adherent to the kernel around the endosperm is seed coat. A seed coat protects the internal parts of the seed from fungi, bacteria and insects and prevents water loss. The seed coat must split open before a new plant may emerge.

Detailed explanation-5: -The building blocks of the seed coat are star-shaped epidermal cells which move by zigzag intercellular joints to form a compact, tiled exterior that protects the seed inside from mechanical damage and other environmental stresses, such as drought, freezing, and bacterial infection.