When does a species become endangered?
When its risk of extinction increases.
AQA GCSE Combined Science: Trilogy (8464) — Biology — Foundation · 4.6.3.3
Revise AQA GCSE Combined Science: Trilogy (8464) — Biology — Foundation specification point 4.6.3.3, Extinction, with free active-recall flashcards. Flip through the set or review every question and answer below.
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When does a species become endangered?
When its risk of extinction increases.
When is a species extinct?
When no individuals of the species remain.
How can climate change threaten a species?
Conditions can change faster than organisms can tolerate them or move to suitable habitats.
How can habitat destruction threaten a species?
It removes the places and resources needed for survival and reproduction.
How can hunting and overharvesting threaten a species?
They can reduce populations faster than they recover.
How can pollution threaten a species?
It can harm organisms or make habitats unsuitable.
What three ways can introduced species threaten native organisms?
Competition, predation and the spread of disease.
How can environmental pressures make a population unable to sustain itself?
They can reduce survival and reproduction until the population can no longer sustain itself.