Just like vertebrate animals, plants possess excretory systems. One way that plants excrete waste products is by opening pores in the surfaces of their leaves. These pores, called stomata, help a plant maintain homeostasis by allowing the plant to
A.
release substances, such as oxygen and water.
B.
collect substances, such as ammonia and salt.
C.
destroy substances, such as sap and uric acid.
D.
make substances, such as chlorophyll and resin.
