Quiz Questions On Transpiration In Plants! Trivia

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Quiz Questions On Transpiration In Plants! Trivia - Quiz

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Questions and Answers
  • 1. 

    What does the shiny waxy cuticle at the top of the leaf do?

    • A.

      Reduces transpiration

    • B.

      Helps prevent wilting

    • C.

      Minimizes water loss

    • D.

      Reduces carbon dioxide absorption

    Correct Answer
    C. Minimizes water loss
    Explanation
    The shiny waxy cuticle on the top of the leaf acts as a barrier, preventing excessive water loss through evaporation. It helps to reduce transpiration, the process by which water is lost from the leaf surface. By minimizing water loss, the cuticle helps to prevent wilting and ensures that the leaf remains hydrated. Additionally, the cuticle does not have a direct impact on carbon dioxide absorption, as this process primarily occurs through the stomata on the underside of the leaf.

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  • 2. 

    Where does the water evaporate in the leaf

    • A.

      At the waxy cuticle

    • B.

      At the surfaces of the mesophyll cells

    • C.

      In the sunlight

    • D.

      At the stomata

    Correct Answer
    B. At the surfaces of the mesophyll cells
    Explanation
    Water evaporates at the surfaces of the mesophyll cells in the leaf. Mesophyll cells are located in the middle layer of the leaf and contain chloroplasts for photosynthesis. These cells have a large surface area due to their numerous projections called cell processes. This increased surface area allows for more water to be exposed to the air, facilitating evaporation. Additionally, the mesophyll cells are in close proximity to the stomata, which are small openings on the leaf surface through which water vapor can escape.

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  • 3. 

    Water vapor diffuses through the leaf and exits the plant through the ______

    Correct Answer
    stomata
    stoma
    Explanation
    Water vapor diffuses through the leaf and exits the plant through the stomata, which are small openings on the surface of leaves. These stomata allow for the exchange of gases, including the release of water vapor during transpiration. The singular form of stomata is stoma.

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  • 4. 

    Why do plants transpire anyway?

    • A.

      Enhances mineral uptake

    • B.

      Allows carbon dioxide to enter for photosynthesis

    • C.

      Keeps leaves cool

    • D.

      Allows it to suck up more water from roots

    Correct Answer(s)
    A. Enhances mineral uptake
    B. Allows carbon dioxide to enter for photosynthesis
    C. Keeps leaves cool
    D. Allows it to suck up more water from roots
    Explanation
    Plants transpire to enhance mineral uptake, allow carbon dioxide to enter for photosynthesis, keep leaves cool, and allow them to suck up more water from the roots. Transpiration helps in the movement of water and nutrients from the roots to the rest of the plant. It also facilitates the exchange of gases, allowing carbon dioxide to enter the leaves for photosynthesis. Transpiration also helps in cooling the leaves, preventing overheating and damage. Additionally, transpiration creates a suction force that helps in the absorption of water and minerals from the roots.

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  • 5. 

    As light intensity increases, the transpiration rate ________. The stomata  _____ to allow more carbon dioxide into the leaf for photosynthesis.

    • A.

      Increases, close

    • B.

      Decreases, open

    • C.

      Decreases, close

    • D.

      Increases, open

    Correct Answer
    D. Increases, open
    Explanation
    As light intensity increases, the transpiration rate increases. This is because light stimulates the opening of stomata, which allows for more water vapor to escape from the leaf through transpiration. Additionally, the increase in light intensity also triggers an increase in photosynthesis, which requires more carbon dioxide. To facilitate this, the stomata open wider to allow more carbon dioxide into the leaf for photosynthesis.

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  • 6. 

    As temperature increases, transpiration speed ________. Evaporation and diffusion are _______ at higher temperatures.

    • A.

      Increases, slower

    • B.

      Decreases, faster

    • C.

      Decreases, slower

    • D.

      Increases, faster

    Correct Answer
    D. Increases, faster
    Explanation
    As temperature increases, transpiration speed increases. This is because higher temperatures increase the rate of evaporation and diffusion, leading to faster transpiration.

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  • 7. 

    Transpiration is _______ in windy conditions. Water vapor is removed ______ by air movement speeding up diffusion of more water vapor out of the leaf.

    • A.

      Faster, quickly

    • B.

      Slower, quickly

    • C.

      Faster, slowly

    • D.

      Slower, slowly

    Correct Answer
    A. Faster, quickly
    Explanation
    In windy conditions, transpiration is faster because the air movement speeds up the diffusion of water vapor out of the leaf. The wind helps to carry away the water vapor quickly, leading to a higher rate of transpiration.

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  • 8. 

    Transpiration is _______ in humid conditions. Diffusion of water vapor out of leaf ____ ____ if the leaf is already surrounded by moist air.

    • A.

      Slower, slows down

    • B.

      Slower, speeds up

    • C.

      Faster, slows down

    • D.

      Faster, speeds up

    Correct Answer
    A. Slower, slows down
    Explanation
    In humid conditions, the air is already saturated with moisture, which means there is a high concentration of water vapor in the air. As a result, the rate of diffusion of water vapor out of the leaf slows down because there is less of a concentration gradient between the leaf and the surrounding air. This causes transpiration, the process by which water evaporates from the leaves, to be slower.

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