the endosperm in monocot plants and endosperm and cotyledons in dicot plants.

An example of a seed that has liquid endosperm would be a coconut. While it does contain cellular endosperm, the coconut milk would be considered liquid endosperm.

i)A zygote if formed due to the fusion of two gametes while endosperm is not from the fusion of two gametes.

ii)A zygote is of 2n condition while endosperm is of 3n condition

iii)A zygote later develops to a plant while endosperm provides nourisment to it.

iv)After fertilization it is a fact endosperm develops first then zygote so that the zygote gets the nourishment sufficiently.

endosperm haustoria is reported in many families for eg. Cucurbitaceae.it is a vermiform appendage present at the chalazal end of the endosperm. it may be free nuclear or cellular.

No, triploid endosperm is in angiosperms only. Gymnosperm means "Naked Seed."