You are presented with the question "What do platypuses not have?" and the following answer choices: 
- alveoli
 - pouch
 - kidney
 - heart
 - uterus
 - eardrum
 - offspring
 - the eyes

Now knowing that female monotremes lack a uterus and vagina and examples of monotremes are the Platypus and Echidna, choose the best answer.


 

     uterus    