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Introduced species
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Optical disk
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Comma
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Tamiflu
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Photolyase
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Akari
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Patina
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Scanner
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Manatee
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Density
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Adventitious
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Gravitational lens
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Sabre tooth tiger
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Salt
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Spandrel
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Electron neutrino
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Western hemlock
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Reaction net energy balance
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SRAM
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Mica
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Papaya
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Chromophore
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Ocean fertilisation
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Double blind trial
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Electroencephalograph
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Galliformes
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CFC
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Duchenne myopathy
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Receptor
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Migmatite
Paedomorphosis
Paedomorphosis is one of the mechanisms of developmental heterochrony, i.e. changes in the speed and duration of development of organisms. The phenomenon results in juvenile features in adults.
Two types of paedomorphosis are recognised: hypomorphism and neoteny.
The axolotl (Ambystoma mexicanum) is the most widely known example of neotenic paedomorphism. Here the gills (in red) are seen which the adult has preserved from its larval stage. © Arne Kuilman CC by-nc 2.0
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