Question

21. Draw a labelled diagram of the longitudinal section of mature ovule which is ready for
fertilization.
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Answer 1

Answer:

typical pistil consists of a basal swollen part (ovary), a stalk (style) and a terminal receptive disc (stigma). Inside the ovary, there are one or more ovules or megasporangia. The main body of the ovule consists of the parenchymatous tissue, the nucellus, with one or two protective coverings or integuments. The ovule is attached to the placenta by means of a small or elongated stalk known as funiculus. The integuments surround the nucellus all around except at the apex leaving a narrow passage, called the micropyle. The base of the nucellus which is not easy to delimit because it merges with the bases of the integument is called chalaza