167 questions and answers in this section

Natural Sciences » Botany

Explain why tree sap rises more quickly at night than during the day.

Explain why tree sap rises more quickly at night than during the day.

At night, when the sun disappears and the temperature drops, the roots of trees continue to absorb water. At this moment, the pressure in the...

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Explain why flowers open at certain times of the day?

Explain why flowers open at certain times of the day?

The opening of flowers mainly depends on changes in the cells located at the base of the petals, called motor cells. They absorb or release...

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Explain why do mushrooms grow so quickly after rain?

Explain why do mushrooms grow so quickly after rain?

Mushrooms grow quickly after rain because they are primarily composed of water. What we see emerging from the ground is the sporophore, the reproductive part, whose ultra-fast...

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Explain why algae can be red, brown or green?

Explain why algae can be red, brown or green?

Algae change colors thanks to their pigments, chemical substances that absorb light differently depending on their category. Green algae mainly contain chlorophyll, just like land...

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Explain why does lemon make you salivate so much?

Explain why does lemon make you salivate so much?

Lemon has a fairly high level of acidity primarily due to its high content of citric acid. This is precisely what, when it reaches the...

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Explain why the Aztecs cultivated medicinal plants in their sacred gardens?

Explain why the Aztecs cultivated medicinal plants in their sacred gardens?

Among the Aztecs, medicinal plants were much more than mere remedies: they had a profoundly spiritual significance. Each plant was linked to a specific deity, forming a...

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Explain why orchids have developed such complex forms.

Explain why orchids have developed such complex forms.

Orchids have evolved into true experts of specialized pollination. Instead of randomly dispersing their pollen, they bet everything on a specific type of insect, or...

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Explain why some vegetable plants can be grown together to improve their growth.

Explain why some vegetable plants can be grown together to improve their growth.

Associating certain plants with each other allows for more harmonious growth. Some varieties release chemical substances through their roots, promoting nutrient absorption in their neighbors. It also...

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Explain why potatoes sprout?

Explain why potatoes sprout?

Potatoes reproduce naturally without seeds, thanks to their tubers. Each tuber has several small indentations called eyes. These eyes contain buds ready to sprout. When...

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Explain why aromatic plants produce essential oils and what is their role?

Explain why aromatic plants produce essential oils and what is their role?

Aromatic plants produce essential oils for simple reasons: to survive and defend themselves. Indeed, these powerful molecules act as a kind of natural shield, repelling...

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