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An unpaired word is one that, according to the usual rules of the language, would appear to have a related word but does not. [1] Such words usually have a prefix or suffix that would imply that there is an antonym , with the prefix or suffix being absent or opposite.
Negroid has Portuguese or Spanish and Ancient Greek etymological roots. It literally translates as "black resemblance" from the Portuguese and Spanish word negro from Latin nigrum, and Greek οειδές -oeidēs, equivalent to -o-+ είδες -eidēs "having the appearance of", derivative of είδος eîdos "appearance".
The coelacanths were thought to have gone extinct , until a living specimen belonging to the order was discovered in 1938.. A living fossil is an extant taxon that phenotypically resembles related species known only from the fossil record.
Clockwise from top left: Mercurana myristicapaulstris, a shrub frog; Dermophis mexicanus, a legless amphibian; Equus quagga, a plains zebra; Sterna maxima, a tern (seabird); Pseudotrapelus sinaitus, a Sinai agama; Tachyglossus aculeatus, a short-beaked echidna
Semantic change (also semantic shift, semantic progression, semantic development, or semantic drift) is a form of language change regarding the evolution of word usage—usually to the point that the modern meaning is radically different from the original usage.
Common descent is a concept in evolutionary biology applicable when one species is the ancestor of two or more species later in time. According to modern evolutionary biology, all living beings could be descendants of a unique ancestor commonly referred to as the last universal common ancestor (LUCA) of all life on Earth.
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Proponents of modernization typically view only Western society as being truly modern and argue that others are primitive or unevolved by comparison. That view sees unmodernized societies as inferior even if they have the same standard of living as western societies.