Question

In a fertilized ovule of an angiosperm, the cells in which n, 2n and 3n conditions respectively occur are ______.

Options

• Antipodal, zygote and endosperm

• Zygote, nucellus and endosperm

• Endosperm, nucellus and zygote

• Antipodals, synergids and integuments

Answer 1

In a fertilized ovule of an angiosperm, the cells in which n, 2n and 3n conditions respectively occur are antipodal, zygote and endosperm.

Explanation:

It is true that most antipodal cells are haploid (n). The union of haploid egg and sperm cells produces a diploid (2n) zygote. A haploid sperm cell fuses with two haploid polar nuclei in the centre cell to generate the triploid (3n) endosperm.