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Biology/Stomata

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Expert: - 10/9/2005


Question
Hi

I'm wondering why the lower epidermis contains more stomata than the upper epidermis?

As well, I'm also wondering why different plants have different numbers of stomata?

Thanks,
Alex H.

Answer
It has to do with the structure of the leaf layers.  The spongy layer is located closer to the lower epiermis and permits greater gas exchange than the palisade layer.

The numbers of stomata depends upon the enviromental factors.  Plants that grow fast in a wet climate have more stomata.

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Walter Hintz

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Science teacher for over 50 years. MSc. in biology. I can answer questions in general biology, zoology, botany, anatomy and physiology and biochemistry.

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I have a MSc in biology and have been a science teacher for over 50 years. At present I am a faculty member at a college and a science consultant at seven catholic schools.

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The Ohio journal of Science
Momentum-The Journal of the Catholic Education Association

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