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ID number:704964
 
Evaluation:
Published: 22.04.2002.
Language: English
Level: Secondary school
Literature: n/a
References: Not used
Extract

Aim: To investigate and compare the distribution density of stomata in the upper and lower epidermis of a dicotyledonous leaf.
Stomata are the principle means of gas exchange in plants. Stomata are small pores they are controlled by guard cells which control the opening and closing of stomata. Stomata allow carbon dioxide to enter the plant, and allow water and excess oxygen to escape. About 90% of water is lost from the leaf during transpiration.
The number of stomata on leaf surface varies among different species. …

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