You are presented with the question "Sperm and egg nuclei combine to do what?" and the following answer choices: 
- combine genes
 - rapid expansion
 - fertilize gametes
 - reproduce
 - allow growth
 - build proteins
 - spread flower seeds
 - remove eggs

Now knowing that fertilization of gametes produces a diploid zygote and sperm and egg nuclei combine to form the diploid zygotic nucleus 2, choose the best answer.


 

   fertilize gametes      