Colors show the average monthly temperature across each of the 344 climate divisions of the contiguous United States. Climate divisions shown in white or very light colors had average temperatures near 50Â°F. Blue areas on the map were cooler than 50Â°F; the darker the blue, the cooler the average temperature. Orange to red areas were warmer than 50Â°F; the darker the shade, the warmer the monthly average temperature.
Best Answer: In botany, a stoma (also stomate; plural stomata) is a tiny opening or pore, found mostly on the under-surface (epidermis) of a plant leaf, and used for gas exchange.ecause their leaves are held vertically, they have the same number of stomata on the two epidermes. If the plant has floating leaves, there will be no stomata on the lower epidermis and they absorb gases directly from water through the cuticle. If it is a submerged leaf, no stomata will be present on either side.
Structure. A stoma is the opening on a plant leaf, but there are specialized cells surrounding each stoma that control how open or closed it is. These specialized cells are called guard cells, and they are triggered by a number of factors, such as sunlight, humidity, temperature, and internal plant chemistry.