Question

in an angiosperm,the embryo sac is haploid,zygote is diploid and endosperm is triploid. justify the statement

Answer 1

embryosac is haploid as it is formed from haploid megaspore formed by meiosis.
zygote is formed by the fusion of male and female gametes.Hence it is diploid.
endosperm is triploid as it is formed by triple fusion by fusion of two polar nuclei and male gamete.

Answer 2

Double Fertilization

Explanation:

• Embryo sac is haploid as it is shaped from haploid megaspore formed by meiosis
• Zygote is shaped by the combination of male and female gametes,Subsequently it is diploid
• Endosperm is triploid as it is shaped by triple fusion by combination of two polar nuclei and male gamete  
• Angiosperms, or flowering plants, experience an exceptional procedure called double fertilization
• After fertilization brings a pollen grain to a flower's female regenerative structure (carpel), a pollen tube discharges two sperm cells
• The second sperm cell wires with two polar cores, making triploid endosperm