The following diagram shows an endospermic seed of Maize grain. Answer the following question:
'X' developed from which part of angiospermic plant?
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → Ovary cell
X is the outermost layer of the maize grain: the pericarp (fruit wall) fused with the seed coat. A maize grain is a fruit, and its pericarp develops from the wall of the ovary.
Option (1) Ovary cell — Correct. After fertilisation, the ovary develops into the fruit and its wall becomes the pericarp. X is formed from the ovary.
Option (2) Zygote — Incorrect. The zygote develops into the embryo (parts A to D and Z).
Option (3) Sepals — Incorrect. Sepals usually wither after fertilisation; they do not form the grain's covering.
Option (4) Petals — Incorrect. Petals fall off after fertilisation.
NCERT Extract:
Seed – “… As ovules mature into seeds, the ovary develops into a fruit, i.e., the transformation of ovules into seeds and ovary into fruit proceeds simultaneously. The wall of the ovary develops into the wall of fruit called pericarp. The fruits may be fleshy as in guava, orange, mango, etc., or may be dry, as in groundnut, and mustard, etc.”