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paedomorphosis

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pae·do·mor·pho·sis or pe·do·mor·pho·sis (pd-môrf-ss)
n. pl. pae·do·mor·pho·ses (-sz)
Phylogenetic change in which juvenile characteristics are retained in the adult form of an organism.


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Moreover, some changes are consistent with an evolutionary quirk known as paedomorphosis, in which species retain in adulthood the youthful dimensions that their ancestors had as juveniles.
 
 
 
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