2007-02-07 10:34:57 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Botany
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.
The pore is formed by a pair of specialized parenchyma cells known as guard cells which are responsible for regulating the size of the opening. Air containing carbon dioxide enters the plant through these openings where it gets used in photosynthesis and respiration.
Oxygen produced by photosynthesis in the chlorenchyma cells (parenchyma cells with chloroplasts) of the leaf interior escapes through these same openings.
Also, water vapor is released into the atmosphere through these pores in a process called transpiration.
Dicotyledons usually have more stomata on the lower epidermis than the upper epidermis.
As these leaves are held horizontally, upper epidermis is directly illuminated. Locating fewer stomata on the upper epidermis can then prevent excess water loss.
Monocotyledons are different. Because 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.
Stoma in Greek means "mouth".
2007-02-11 00:22:55 · answer #1 · answered by Anonymous · 1⤊ 0⤋
Stomata Function
2016-10-05 06:09:18 · answer #2 · answered by ? 4 · 0⤊ 0⤋
Are pores in the epidermis that allow gas exchange. (carbon dioxide gets in-water vapor and oxygen out) Guard cells surround each stoma and they open and close the stomata depending on environmental conditions and the needs of the plant. Usually stomata are open during the day and closed during the night.
2007-02-07 10:40:51 · answer #3 · answered by Kiera B 2 · 4⤊ 0⤋
function stomata plants
2016-01-30 20:42:29 · answer #4 · answered by Rita 3 · 0⤊ 0⤋
Well stomata is plural, more than one, stoma is singular just one. A stoma is one of the minute pores in the epidermis of a leaf or stem through which gases and water vapor pass, according to my sources.
2007-02-07 11:14:27 · answer #5 · answered by Professor Armitage 7 · 0⤊ 0⤋
Gas exchange. Intaking CO2; releasing oxygen and water vapour from photosynthesis.
2007-02-07 10:40:43 · answer #6 · answered by Kirstin 2 · 2⤊ 0⤋
to allow gas exchange between the environment and the inside of leaves
2013-12-30 09:03:57 · answer #7 · answered by Kay Kay 1 · 0⤊ 0⤋
Every time I think of Stomata I think of tiny little mouths. These are on the leaves (very small) and take in water for growth.
2007-02-07 10:41:00 · answer #8 · answered by me 2 · 0⤊ 1⤋
E I did this in Biology like a few months ago so i am not that sure.
2016-03-13 08:06:08 · answer #9 · answered by Anonymous · 0⤊ 0⤋