| Answer | Crossword Clue |
|---|---|
| STOMA | Plant's breathing pore |
| STOMA | Breathing pore in plants. |
| STOMA | Breathing pore, in plants. |
| STOMA | Breathing pore in a plant. |
| lenticellate | of or like a lenticel, a breathing pore in bark |
| STOMATA | Breathing pores in plants. |
| silurian | noting or pertaining to a period of the Paleozoic Era, occurring from 425 to 405 million years ago, notable for the advent of air-breathing animals and terrestrial plants |
