1. Tardigrade
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  3. Biology
  4. In the developing ovule of most of the angiosperms, megaspore mother cell is situated within the nucellus

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Q. In the developing ovule of most of the angiosperms, megaspore mother cell is situated within the nucellus

NTA AbhyasNTA Abhyas 2022

Solution:

One cell of the nucellus towards the micropylar end enlarges and derives nutrition from other nucellar cells. This is called megaspore mother cell. It undergoes meiosis to form a linear tetrad of four haploid megaspores. Out of these, three megaspores towards the micropylar end disintegrate. The one towards the chalaza is the functional megaspore.