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The primary function of plant leaves is for photosynthesis. Other functions include the transpiration and (in some plants) the storage of food material.

In carry out its primary function, plants are various adaptations. Some are as follows:


  • To expose as much of the leaf as possible to sunlight
Sunlight is the main ingredient for photosynthesis. To allow for as much light as possible to reach them, leaves are generally flat with a large surface area. They are supported by a stem and petiole which allows them to stand out from the branch and receive light.


  • To allow for the diffusion of gases in and out of the leaf
To allow for optimum transpiration, leaves are thin. They have stomata on their lower surface and contain air spaces in spongy mesophyll.


  • To expose chlorophyll to as much sunlight as possible
Leaves have a transparent epidermis. Chloroplasts, the cells that contain the chlorophyll are arrange broadside, end-on-end to expose as many of them as possible to sunlight.


  • To provide a supply of water and minerals, as well as remove manufactured food materials
The vascular bundle passes through the leaf (usually through the midrib) near the mesophyll cells. The vascular bundle contains a xylem which transports water and nutrients towards the leaves, and a phloem which transports food materials out of the leaves to where they are needed by the plants as well as to the locations in the plant where they stored.
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11y ago
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12y ago

Stomata- respiration

Leaves help provide atmospheric water

Leaves provide us oxygen

Leaves store food for the future.

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Q: What are the adaptations of a plant leaf and their function?
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