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small pores have on the leaves excess water transfer into the atomospehere incase there have have no the stomata (pores) on the leaf the plant will die.must the plant can must drain the water.So the stomata exist upper surface of the water.
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∙ 11y ago
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∙ 8y agoWiki User
∙ 13y agoBecause exposing it to the sunlight will cause a greater chance of evaporation when the stomata open and close to stimulate stomata.
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∙ 7y agoBecause they could become blocked by debris. Far better for them to be positioned on the underside of the leaf - where they have some protection.
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∙ 11y agobecause more transpiration occur at lower surface
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∙ 7y agoStomata have to open to allow gas exchange, but this also results in water loss. The shaded nature of the underside of the leaf reduces evaporation somewhat.
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∙ 10y agolove
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What are the pores on leaves called?
These are known as stomata - pronounced stoh-muh-tuh ; the singular form is stoma.The are generally found on the underside of the leaves and sometimes along the stems; theyallow for gaseous exchange between the leaf and the atmosphere. Carbon dioxide in and water vapour and oxygen out (transpiration).They are normally on the underside of leaves as the waxy cuticle covers the upper epidermis; strangely some plants that are grown in tissue culture have stomata on both leaf surfaces, as a cuticle does not develop until the tissue culture plantlets are exposed to an open environment (and ultraviolet light).Plants growing in arid areas have fewer stomata to reduce transpiration where as plants in tropical areas have large or many stomata to take advanatge of the ideal growing conditions.
How are stomata adapted to their function?
plants have thick cuticles some lose their leaves in winter some have spiral leaves most of stomata on the bottom side of the leaves (less contact with sunlight) shinny leaf surface, reflects sunlight, less heat absorbed guard cells, tells the stomata to close when in short supply of water
Where does most transpiration occur in a leaf?
On the bottom of the leaves. This is because Stomata, the place in the leaf were gaseous exchanges of water and carbon dioxide occur, are more common in this part of the leaf compared to the top of the leaf. This is an adaption, because if plants had all of their stomata on the top of their leaves, excessive loss of water will be lost to the environment and cause dehydration of the plant and even potential death.
Why are the photosynthetic cells mainly on the upper side of a leaf?
The upper part of the leaf is were the most sunlight hits the leaf, so due to adaptations, chloroplasts moved to the upper parts of leaves.
What guard cells guard?
They are the pair of cells that surround the stomata (pores on the underside of leaves) They can change shape to open or close the stomata. Most plants open their stomata during the day (to allow co2 to enter for photosysthis) and close them at night. However cacti open their stomata during the night to reduce water loss, and have to use stored co2 for photosysthesis.
Why Carbon-dioxide is absorbed more by lower leaf surface?
The underside of leaves is where the 'stomata' are to be found in most (not all) plants and it is through these stomata that the gas exchange occurs. The upper surfaces of leaves are usually tough and shiny to protect the leaf and shed water. If the stomata were on the upper surface and the leaf was wet, the water would block them and impede gas exchange.
Are stomata under surface or upper surface of the leaf?
In most cases it is at the underside of the leaf, as it does not want sunlight to dry it up.
Where are stomata generally most abundant in the majority of leaves?
On a dorsi-ventral leaf most of the stomata are found on the lower side of the leaf, that remains away from sunlight. On an iso-bilateral leaf stomata are present on both the sides, upper as well as lower.
What adaptation would be most helpful to water lilies?
chloroplasts located only on the upper surface of leaves
How do gases enter and leave plants?
In terrestrial plants, gas enters and leaves (termed "gas exchange") through cell-lined pores called "stomata." Stomata open and close in response to light and humidity, permitting oxygen, carbon dioxide and water vapor to enter and leave the plant. In most terrestrial plants, the stomata are located on the surface of the leaves, or in cacti, on the surface of the stems. In aquatic plants, gas exchange directly though the tissue surface.
Most leaves have the upper surface more green and shiny than the lower one - Why?
The leaves are more green on the upper surface because of the presence of a large number of chloroplasts.
What side of the leaves are numerous stomata?
most stomatas shown on around the leaves
What are the pores on leaves called?
These are known as stomata - pronounced stoh-muh-tuh ; the singular form is stoma.The are generally found on the underside of the leaves and sometimes along the stems; theyallow for gaseous exchange between the leaf and the atmosphere. Carbon dioxide in and water vapour and oxygen out (transpiration).They are normally on the underside of leaves as the waxy cuticle covers the upper epidermis; strangely some plants that are grown in tissue culture have stomata on both leaf surfaces, as a cuticle does not develop until the tissue culture plantlets are exposed to an open environment (and ultraviolet light).Plants growing in arid areas have fewer stomata to reduce transpiration where as plants in tropical areas have large or many stomata to take advanatge of the ideal growing conditions.
Why are stomata's in the lower epidermis but not in the upper epidermis?
The explanation lies in how the stomata works. They regulate any gases that pass through them. When the temperature is too hot, it will close to conserve water vapor but this will block CO2 coming in also. Therefore plants don't want to have their stomata closed all the time nor opened all the time. Sunlight hits the top of the leaves and therefore the temperature and light intensity is higher on the top surface of the leaves. If many stomata were to be located on the top, the plant would loose much of its water and when the stomata closes to conserve water, it won't get as much CO2. Therefore for most plants, the stomata stay on the bottom where the temperature is a bit cooler. Also it is protected from the wind since wind can cause evaporation of water.
How are stomata adapted to their function?
plants have thick cuticles some lose their leaves in winter some have spiral leaves most of stomata on the bottom side of the leaves (less contact with sunlight) shinny leaf surface, reflects sunlight, less heat absorbed guard cells, tells the stomata to close when in short supply of water
Is the loss of water from plants?
Plants lose most of their water by transpiration through the stomata of the leaves.
Where does most transpiration occur in a leaf?
On the bottom of the leaves. This is because Stomata, the place in the leaf were gaseous exchanges of water and carbon dioxide occur, are more common in this part of the leaf compared to the top of the leaf. This is an adaption, because if plants had all of their stomata on the top of their leaves, excessive loss of water will be lost to the environment and cause dehydration of the plant and even potential death.
