167 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?

Leaves contain different types of pigments, mainly chlorophyll, carotenoids, and anthocyanins. Chlorophyll gives leaves their green color and is responsible for capturing light for photosynthesis. Carotenoids, on...

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Explain why some flowers only open at night?

Explain why some flowers only open at night?

Some flowers patiently wait for nightfall to open because their favorite pollinators are nocturnal. These insects and animals that roam mostly at night range from...

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Explain why cacti can survive without water in the desert?

Explain why cacti can survive without water in the desert?

Thanks to their thick and fleshy shape, cacti limit their exposure to the sun as much as possible, which helps to reduce the surface area...

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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?

Flowers contain various chemical substances that determine whether they are safe to consume or not. Some contain compounds like alkaloids, digitalin, or solanine, which often...

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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?

Marine algae are the undisputed champions of oxygen production in the ocean. Through photosynthesis, they absorb sunlight and release oxygen in exchange. Alone, these small...

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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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