You are presented with the question "Sperm had to swim from what to what reproductive organs for zygotes to occur." and the following answer choices: 
- barnacles
 - male to female
 - animals
 - ocean water
 - male to male
 - mouth of rivers
 - female to male
 - female to female

Now knowing that sperm had to swim from male to female reproductive organs for fertilization and if fertilization occurs, the fertilized eggs are now described as pre-embryos or zygotes, choose the best answer.


 

  male to female       