In angiosperms, zygote is diploid while primary endosperm cell is triploid. Explain.

Explanation

Zygote is a product of fusion of haploid male gameter and haploid female gamete, i.e. egg cell. Thys it is diploid.
`underset((n))("Male gamete")+underset((n))("Egg")tounderset((2n))("Zygote")`
Whereas, primary endosperm cell is a product of fusion of secondary nucleus (2n) and a haploid make gameter so it is triploid
`underset((2n))("Secondary nuleus")+underset((n))("Male gamete")`
`tounderset((3n))(" Primary endosperm cell")`