Question
What are stomata? Explain the functions and the opening and closing of stomata? [3 MARKS]
Answer:
:
Definition: 1 Mark
Opening mechanism: 1 Mark
Function: 1 Mark
Stomata are minute apertures found typically on the outer leaf skin layer, also known as the epidermis. Stomatalopening is guarded by two bean-shapedcells called
guard cells. When guard cells are turgid i.e. filled with water, the stomatal pore opens and when guard cells lose water and become flaccid, the stomatal pore closes.
Their mainfunctionis to allow diffusion ofgases such as carbon dioxide, water vapour, and oxygen.
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:
Definition: 1 Mark
Opening mechanism: 1 Mark
Function: 1 Mark
Stomata are minute apertures found typically on the outer leaf skin layer, also known as the epidermis. Stomatalopening is guarded by two bean-shapedcells called
guard cells. When guard cells are turgid i.e. filled with water, the stomatal pore opens and when guard cells lose water and become flaccid, the stomatal pore closes.
Their mainfunctionis to allow diffusion ofgases such as carbon dioxide, water vapour, and oxygen.
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