Final answer:
The plural form of 'stoma' is 'stomata'. Stomata are tiny openings found on plant leaves, stems, and other organs, surrounded by guard cells that regulate their opening and closing.
Step-by-step explanation:
The plural form of "stoma" is stomata.
Stomata are tiny openings found on the surface of plant leaves, stems, and other plant organs. They are surrounded by two specialized guard cells that regulate their opening and closing, allowing the exchange of gases like carbon dioxide and oxygen.
For example, Figure 30.24 visualizes several stomata on the surface of a sumac leaf, and Figure 23.8 shows a colorized scanning-electron micrograph of a closed stoma and its surrounding guard cells on a dicot leaf.