169 questions and answers in this section

Natural Sciences » Botany

Explain why plants need light to grow.

Explain why plants need light to grow.

Light is basically the fuel that allows plants to make their own energy. Thanks to the green pigment called chlorophyll, they capture sunlight. This is...

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Explain why sunflowers follow the sun's trajectory throughout the day?

Explain why sunflowers follow the sun's trajectory throughout the day?

Heliotropism is the ability of plants (like the sunflower) to orient themselves throughout the day towards the sun. Specifically, at the start of the day, the flower...

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Explain why do the leaves of trees change color in autumn?

Explain why do the leaves of trees change color in autumn?

The green color of the leaves is mainly due to the presence of chlorophyll. This pigment absorbs sunlight to carry out photosynthesis and produce the...

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Explain why the seeds of some plants can remain dormant for years before germinating.

Explain why the seeds of some plants can remain dormant for years before germinating.

Some seeds have a very tough coat that prevents water or air from entering. Without sufficient water or oxygen, they remain dormant. Others contain internal...

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Explain why tree roots can crack concrete.

Explain why tree roots can crack concrete.

As they grow, tree roots constantly seek water and nutrients, spreading gradually in all directions. This growth occurs slowly but with consistent pressure. The problem...

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Explain why are forest fires necessary for some plant species?

Explain why are forest fires necessary for some plant species?

Some plants actually need fire to release their seeds or to trigger their germination. For example, the cones of certain pines like the Aleppo pine...

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Explain why the presence of lichens is an indicator of air quality?

Explain why the presence of lichens is an indicator of air quality?

Lichens are organisms that are very sensitive to air quality, making them effective bio-indicators for monitoring air pollution. Since they have no roots, they absorb...

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Explain why forest mushrooms react to light and change shape.

Explain why forest mushrooms react to light and change shape.

Wood mushrooms respond to light through special molecules called photoreceptors. These tiny detectors act like little microscopic eyes—not for clear vision, but just to perceive...

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Explain why bananas are curved?

Explain why bananas are curved?

Bananas are curved because their biological growth forces them to move towards the light source, which is called phototropism. Essentially, bananas grow oriented upwards rather...

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Explain why do the flowers of some plants close at night and open during the day?

Explain why do the flowers of some plants close at night and open during the day?

These opening and closing movements of flowers are mainly the result of a phenomenon called nyctinasty. This process relies on variations in internal pressure within...

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