You are presented with the question "What do some female mammals lack?" and the following answer choices: 
- epidermal
 - vision
 - uterus
 - alleles
 - fur
 - a cuticle
 - eardrum
 - alveoli

Now knowing that female monotremes lack a uterus and vagina and monotremes are mammals that lay eggs, choose the best answer.


 

   uterus      