You are presented with the question "Adult sponges produce sperm and what other sex cell?" and the following answer choices: 
- testicles
 - it needs them
 - gastropod shells
 - fertile
 - testosterone
 - zygotes
 - female gametes
 - barnacles

Now knowing that adult sponges produce eggs and sperm and each ovule usually contains one egg , the female gamete or sex cell, choose the best answer.


 

       female gametes  