Question

Leaves of green plants contain openings known as stomata these are opened and closed by specialized cels that allow gases to be exchanged between the leaf and the outside environment which of the following best describes the flow of gases into and out of a leaf through stomata on a sunny day?
A. Carbon dioxide and oxygen move in; ozone moves out
B. Carbon dioxide moves in; oxygen moves out
C. Water vapor and ozone move in; carbon dioxide moves out
D. Oxygen moves in; nitrogen moves out

Answer 1

On a sunny day, plants undergo photosynthesis, where they take in carbon dioxide and release oxygen. Thus, the correct answer that describes the flow of gases into and out of a leaf through stomata on a sunny day is:

**B. Carbon dioxide moves in; oxygen moves out.**