166 questions and answers in this section

Natural Sciences » Botany

Explain why the color of leaves changes in the autumn?

Explain why the color of leaves changes in the autumn?

Tree leaves contain several pigments responsible for their color. Among these pigments, we find chlorophyll, carotenoids, and anthocyanins. Chlorophyll is the main pigment in plants, responsible for...

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Explain why some flowers only open at night?

Explain why some flowers only open at night?

Night pollination is a fascinating phenomenon observed in certain plants which, unlike most other flowers that open during the day, release their scent and open...

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Explain why cacti can survive without water in the desert?

Explain why cacti can survive without water in the desert?

Cacti have developed unique physical characteristics to survive in arid desert environments. Their ability to reduce water loss is essential for their survival. Small leaves...

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Explain why some flowers are edible while others are toxic to humans?

Explain why some flowers are edible while others are toxic to humans?

The chemical composition of flowers is a key element in determining their edibility. Some flowers contain essential nutrients such as vitamins and minerals. For example, nasturtiums are...

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Explain why do strawberries have seeds on their surface?

Explain why do strawberries have seeds on their surface?

The seeds on the surface of strawberries are actually achenes, indehiscent dry fruits resulting from the ovary of the flower after fertilization. Each achene is...

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Explain why plants turn towards the sunlight?

Explain why plants turn towards the sunlight?

Positive phototropism is a phenomenon observed in many plants that have the ability to turn towards the sunlight. This movement allows plants to maximize their...

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Explain why can algae be considered as the lungs of the ocean?

Explain why can algae be considered as the "lungs" of the ocean?

Photosynthesis is the process by which plants, including algae, convert sunlight into chemical energy to produce their own food. During photosynthesis, algae absorb carbon dioxide...

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Explain why the seeds of some trees only germinate after a forest fire?

Explain why the seeds of some trees only germinate after a forest fire?

The promotion of forest regeneration is a crucial process for maintaining biodiversity and ecosystem balance. After a fire, some tree species have evolved to depend...

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Explain why orchids have such varied shapes and colors.

Explain why orchids have such varied shapes and colors.

Orchids have developed very specific pollination strategies, adapted to particular insects such as bees, butterflies, or hummingbirds. Each species of orchid attracts a specific type...

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Explain why some marine algae glow in the dark and how this phenomenon occurs.

Explain why some marine algae glow in the dark and how this phenomenon occurs.

Some marine algae glow in the dark thanks to a phenomenon called bioluminescence, which is the ability to produce and emit light naturally. This phenomenon...

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