You are presented with the quiz "Fertilization of what leads to formation of multicellular embryo in venter" 

But you don't know the answer, so you turn to your teacher to ask for hints. He says that "fertilization of gametes produces a diploid zygote" and "diploid zygote forms multicellular embryo in venter". 

So, what's the best answer to the question?


 

        gametes   