Q:

Why are plants green?

A:

Quick Answer

Plants are green because of a pigment called chlorophyll. Chlorophyll absorbs all colors of visible light except for green, which is reflected. Thus, the reflection of the green part of visible light is what causes plants to look green.

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Why are plants green?
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Full Answer

Organelles called chloroplasts contain the pigment chlorophyll. Photosynthesis is the process of making food out of carbon dioxide, water and sunlight. All organisms capable of performing photosynthesis, except for the photosynthetic bacteria, contain chlorophyll. Two types of chlorophyll exist in green plants, with the most prevalent being chlorophyll-a. Chlorophyll-b also occurs in all plants, but in smaller amounts than chlorophyll-a.

Other energy-absorbing pigments also exist in plants. Carotenoids, the pigments that give carrots and fall leaves their orange color, absorb all colors of the visible spectrum except for orange, while lycopene gives tomatoes their red color.

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Related Questions

  • Q:

    What gives plants their green color?

    A:

    A pigment called chlorophyll gives plants their green color. Chlorophyll is an indispensable molecule in photosynthesis, the process by which plants convert sunlight into chemical energy. Chlorophyll is green because the molecules absorb the blues and reds in the spectrum of light and reflect the greens and yellows.

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  • Q:

    What is the main pigment used by green plants to absorb energy?

    A:

    Chlorophyll is the pigment used by plants to absorb energy in a process known as photosynthesis. Chlorophyll is a green pigment that is responsible for a plant's colors. When chlorophyll absorbs sunlight as energy, it begins a reaction to allow for the manufacture of sugar and other molecules.

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  • Q:

    Why do leaves appear green?

    A:

    Leaves appear green because they contain chlorophyll. Chlorophyll absorbs the other colors of light wavelengths, leaving only the green reflected, and therefore visible to the human eye.

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  • Q:

    Why are plants important?

    A:

    Plants provide food to people and animals, regulate the water cycle, create oxygen and provide a habitat for other species. Without plants, life on Earth would not be sustainable for most species, including humans.

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