extincions

In a sentence

• Les extincions massives han canviat la història de la vida a la Terra.

  Mass extinctions have changed the history of life on Earth.

  Here, 'extincions' represents the phenomenon of species being wiped out in large numbers at specific events in history.

• Aquestes extincions podrien provocar un desequilibri en l'ecosistema.

  These extinctions could cause an imbalance in the ecosystem.

  In this sentence, 'extincions' is used in a hypothetical context to discuss its potential impact on natural systems.

• La famosa extinció del Dinosaure Tiranosaure Rex es considera un esdeveniment clau.

  The famous extinction of the Tyrannosaurus Rex is considered a key event.

  'Extinció' in this sentence, singular form, is used to denote the specific event of a species' last members dying out.