Explain how oxygen in the atmosphere is responsible for the formation of other elements.

Oxygen is essential to enabling many of the Earths life forms to survive -- without access to oxygen, humans cant live for more than a few minutes. The air that enters human lungs contains about 21 percent oxygen. The process responsible for producing most of the Earths oxygen is known as photosynthesis. In this process, plants and certain other organisms convert sunlight into oxygen and other products.

Explanation:

answer >   yes we do, women; have three holes, urethral opening(pee hole, vagina, and the women pee/girls pee out of the urethra like the men do; only they have a single opening to pee/ejaculate.   (sorry if i'm too forward with this, but this is for a biology class, isn't it? )

hope that !         : )