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Juvenile (organism)

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Juvenile (organism)

Young wild boar sucking from adult female. Here, juvenile colouring acts as a form of camouflage
Juvenile (left) and adult (right) leaves of Stone Pine

A juvenile is an individual List of animal names).

Some organisms reach sexual maturity in a short metamorphosis, such as eclosion in many insects. For others, the transition from juvenile to fully mature is a more prolonged process — puberty for example. In such cases, juveniles during this transformation are sometimes called subadults.

Many invertebrates, on reaching the adult stage, are fully mature and their development and growth stops. "Juvenile" refers to the larva or comparable stages in such taxa.

In vertebrates and some invertebrates (e.g. spiders), larval forms (e.g. tadpoles) are usually considered a development stage of their own, and "juvenile" refers to a post-larval stage that is not fully grown and not sexually mature. In amniotes and most plants, the embryo represents the larval stage. Here, "juvenile" in general applies to the time between hatching/birth/germination and reaching maturity.


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