Leaves of green plants contain openings known as stomata. These are opened and closed by specialized cells that allow gases to be exchanged between the leaf and the outside environment. Which phrase best represents the flow of gases into and out of a leaf through stomata on a sunny day? a oxygen moves in; nitrogen moves out
b carbon dioxide moves in; oxygen moves out
c carbon dioxide and oxygen move in; ozone moves out
d water vapor and ozone move in; carbon dioxide moves out