467 questions and answers in this section
Explain why do spiders prefer to weave their web at night?

Explain why do spiders prefer to weave their web at night?

Spiders have developed nocturnal activity mainly because at night, they benefit from several valuable evolutionary advantages. The darkness provides an ideal hunting ground: their prey...

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Explain why some crystals can amplify electrical signals?

Explain why some crystals can amplify electrical signals?

Crystals naturally exhibit some pretty cool electrical characteristics, particularly due to their organized atomic structure. In simple terms, their atoms are nicely arranged in regular...

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Explain why dendrobates are so colorful.

Explain why dendrobates are so colorful.

In dart frogs, bright colors are clearly designed to send a clear message of "Caution, danger!" to potential predators. This is called aposematism: a bold...

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Explain why insects are so resilient.

Explain why insects are so resilient.

Insects have an exoskeleton, a kind of external armor made primarily of chitin. Chitin is a strong yet lightweight material that acts as a protective...

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Explain why some fish can walk on land.

Explain why some fish can walk on land.

Originally, fish fins primarily serve to swim, stabilize their bodies, and navigate underwater. However, in some species, these fins have gradually changed, evolving into true...

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Explain why oceans are salty but lakes are fresh?

Explain why oceans are salty but lakes are fresh?

The salt in the oceans primarily comes from land rocks. Over time, rain and rivers wear down these rocks, which contain numerous minerals, including salt, mainly in...

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Explain why flamingos are pink?

Explain why flamingos are pink?

The flashy pink color of flamingos mainly comes from what they eat. These birds love foods rich in pigments called carotenoids, which are primarily found...

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Explain why kangaroos cannot move backwards?

Explain why kangaroos cannot move backwards?

Kangaroos have a very unique anatomy with powerful and elongated hind legs specially adapted for jumping. Their bones, especially those of the hind limbs, are...

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Explain why frogs' eyes blink when they breathe underwater?

Explain why frogs' eyes blink when they breathe underwater?

Frogs have special eyes that can sink slightly into their skull when they blink. In fact, when a frog closes its eyelids, its eyes retract...

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Why do squirrels eat hazelnuts?

Why do squirrels eat hazelnuts?

Hazelnuts are a natural energy boost, packed with unsaturated fats, essential for facing cold seasons. They are also full of plant proteins to keep their...

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