In botany, a stoma is a pore, found in the leaf and stem epidermis that is used for gas exchange. The pore is bordered by a pair of specialized parenchyma cells known as guard cells which are responsible for regulating the size of the opening. Hope that helps you out. best way I can put it for ya!
This would be transcription. You transcribe the DNA into mRNA.
Answer:
The early atmosphere was mainly carbon dioxide and water vapour. Water vapour condensed to form the oceans. Photosynthesis caused the amount of carbon dioxide to decrease and oxygen to increase.
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Above plants
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A volcano is formed whenever molten rock,ash and gases break out from the opening in the Earths surface.
