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Question
A neat labelled diagram describes the parts of a typical angiospermic ovule.
Solution
The main part of the ovule is the nucellus which is enclosed by two integuments, leaving an opening called the micropyle. The ovule is attached to the ovary wall by a stalk, called funiculus. The basal part is Chalaza.
Structure of an Ovule
The embryo sac contains seven cells and the eighth nuclei located within the nucellus. Three cells at the micropylar end form the egg apparatus and the three cells at the chalazalnte9uments end are the antipodal cells. The remaining two nuclei are called polar nuclei found in the centre. In the egg apparatus, one is the egg cell (female gamete) and the remaining two cells are the synergids.
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