You are presented with the question "What shape is the organ where fertilization occurs when sperm swim to an egg?" and the following answer choices: 
- a prism
 - Flask
 - liquid
 - rings
 - Seesaw
 - porous
 - organ
 - gills

Now knowing that fertilization occurs when sperm swim to an egg inside an archegonium and each archegonium is flask shaped, choose the best answer.


 

  Flask       