241 questions and answers in this section

Animals and Nature » Biodiversity

Explain why some snails can hibernate for up to 3 years.

Explain why some snails can hibernate for up to 3 years.

Some snails enter prolonged hibernation in response to extreme weather conditions, particularly severe droughts or intense and prolonged cold. When their immediate environment no longer...

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Explain why some animal species reproduce only once in their lifetime?

Explain why some animal species reproduce only once in their lifetime?

Some species are programmed to maximize their reproductive success by reproducing only once in their lifetime: this is called semelparity. In this case, all the...

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Explain why some shells produce pearls?

Explain why some shells produce pearls?

When a foreign body such as a grain of sand or a parasite accidentally enters the shell, the organism of the mollusk instinctively reacts. To...

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Explain why mantis shrimp can see colors invisible to us.

Explain why mantis shrimp can see colors invisible to us.

Mantis shrimp have truly unique eyes, composed of thousands of facets called ommatidia. These eyes function independently of one another and move in all directions, providing exceptional...

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Explain why do koalas sleep so much?

Explain why do koalas sleep so much?

Koalas have a particularly slow metabolism, meaning they burn their energy very slowly. The reason: their ultra-specialized diet consisting exclusively of eucalyptus leaves, a plant...

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Explain why seals have such big eyes?

Explain why seals have such big eyes?

Seals live in an often dark aquatic environment, where light is quickly absorbed by the water. Having large eyes allows them to better capture the...

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Explain why nymphs live in watercourses?

Explain why nymphs live in watercourses?

The nymphs are female creatures from Greek mythology closely linked to nature, particularly to aquatic environments such as streams, rivers, and springs. Known as Naiads, these water...

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Explain why pearl oysters produce pearls?

Explain why pearl oysters produce pearls?

Everything starts when an irritant, often a grain of sand or a parasite, sneaks into the oyster. Naturally, this unwanted visitor disturbs her greatly, so...

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Explain why elephants are color blind.

Explain why elephants are color blind.

In elephants, color blindness mainly stems from the fact that they only have two types of color receptor cells in their retina, called cones. We...

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Explain why the dragon is often described as a fire-breather?

Explain why the dragon is often described as a fire-breather?

The fire-breathing dragon appears in several ancient mythologies, often described as a primordial monster embodying chaos. For example, in Greek mythology, Typhon was a giant...

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