Female monotremes lack a uterus and vagina.
Examples of monotremes are the platypus and echidna.
Echidnas lack a uterus and vagina.
What lacks a uterus and vagina?
Options:
1. Conifers
2. rats
3. humans
4. mammals
5. echidnas
6. kalenchoes
7. alpacas
8. barnacles