Q:

How does carbon dioxide enter the leaf?

A:

Quick Answer

Carbon dioxide enters the leaf through tiny openings called the stomata. These specialized apertures open during the day to allow for the exchange of carbon dioxide and water in a process known as transpiration.

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Full Answer

The leaf of a plant is protected by a waxy substance called the cuticle. This prevents the air, containing carbon dioxide, from entering the leaf. Since carbon dioxide is one of the primary components that drive photosynthesis, plant leaves adapted and evolved these highly specialized structures to allow the passage of carbon dioxide. In some unicellular and marine autotrophic plants, carbon dioxide freely enters without passing through any specialized part.

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Related Questions

  • Q:

    What is the function of stomata?

    A:

    Stomata are microscopic openings on the surfaces of plant leaves that allow for the easy passage of water vapor, carbon dioxide and oxygen. They are crucial to the function of leaves as photosynthesis requires plenty of carbon dioxide as well as the release of waste oxygen and excess water. "Stomata" means "mouth" in the Greek language.

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  • Q:

    How does water move through a leaf?

    A:

    How Stuff Works explains that water reaches the leaves of plants through the xylem vessels, and it escapes through small holes in the leaf known as stomata. The process by which the water moves from the capillaries to the xylem vessels and into the stomata is called transpiration. Plants absorb water through their roots, which contain capillaries. The capillaries are responsible for sending water through the xylem vessels.

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  • Q:

    What is the purpose of stomata?

    A:

    According to Understanding Evolution, the main purpose of stomata is to enable carbon dioxide to enter the leaf rapidly and allow oxygen and water vapor to exit out of the leaf quickly. They primarily control transpiration and gas exchange with the atmosphere.

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  • Q:

    What do plants give us?

    A:

    Plants provide several benefits to humans, including the filtration of carbon dioxide into oxygen and increasing the humidity of the environment. Plants also improve the mood and health of people who spend time near them.

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