Question

Which part of the leaf lets carbon dioxide into the leaf and oxygen and excess

water out of the leaf?
1 chloroplasts
2 epidermis
3 stomata
4 veins
5 none of the above

Answer 1

The flat surface of the leaf contains many tiny openings called stomata. These are like very small holes that allow carbon dioxide into the leaf, and let oxygen out.

Fun fact: there can be over 100,000 stomata in an inch of leaf!