Compare the vagina and the anus. How does the fact that the vagina has a mucous membrane lining and the anus does not affect these structures as sexual organs?

Explanation:

The mucous membrane lining provides lubrication which allows the vagina to act as a sexual organ. Without this membrane lining, the skin would get dry which would create friction when involved in intercourse. This friction can cause damage such as membrane tearing and even bleeding or burns. The anus does not have the mucous membrane lining like the vagina does which affects it from being an effective sexual organ like the vagina.

equal distribution i think.

desert perennials often survive by remaining dormant during dry periods of the year, then springing to life when water becomes available. most annual desert plants germinate only after heavy seasonal rain, then complete their reproductive cycle very quickly.