Question

Where are the pollen nuclei situated and how they are different from egg?

Answer 1

they are present at the middle of embryo sac they are diploid or they are also helps the formation of endosperms by double fertilization

Answer 2

I think you mean polar nuclei. They are located inside the embryo sac,in the middle.They are different because it has one cell but have 2 nuclei and fused to form a diploid secondary nucleus.

I hope it helped,hit a thanks