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Solution


Q.

In angiosperm, the haploid, diploid and triploid structures of a fertilized embryo sac sequentially are                 [2023]
1 Synergids, zygote and primary endosperm nucleus  
2 Synergids, antipodals and polar nuclei  
3 Synergids, primary endosperm nucleus and zygote  
4 Antipodals, synergids, and primary endosperm nucleus.  

Ans.

(1)

Synergids and antipodals are haploid structures. Zygote and polar nuclei are diploid structures. Primary endosperm nucleus is triploid structure of a fertilised embryo sac. In a fertilised embryo sac the haploid, diploid and triploid structures are synergids, zygote and primary endosperm nucleus, respectively.