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Geode
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Tautomerism
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Basel Convention
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Spermaceti
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Ependymoma
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Rootkit
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Bone marrow donor
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Super-Kamiokande
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Anisotropy
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Equinox equation
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Deciduous forest
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Spinal cavity
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Predisposition
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Velociraptor
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SNAPI
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Cranberry
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Analogy
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West Nile Virus
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Granulopenia
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Radiative forcing
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Rhombohedral system
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Curettage
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Internuptial
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Recycling
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GPU
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Germ
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Transmissible spongiform encephalopathy
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Permanent world
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Marburg fever
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Water table
Senescence
Senescence is the process of biological ageing which occurs following irreversible changes in an organism, leading to death.
It is a physiological process that begins after the maturity phase and results in inevitable progressive deterioration of vital functions: reproduction, motility, immune system, etc.
Senescence can be clearly seen in this old tree. © Matthieu Luna CC by-nc-nd 2.0
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