Extinction (AQA GCSE Biology Combined Science): Flashcards
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Extinction definition
Extinction definition
Entire species died out; no individuals remain alive
Environmental changes causing extinction
Environmental changes causing extinction
Rapid changes (e.g. climate shifts) occur faster than species can adapt
New predators causing extinction
New predators causing extinction
Species unable to defend/escape decline & become extinct
New diseases causing extinction
New diseases causing extinction
Devastating if species lacks genetic diversity & resistance
Genetic diversity role in disease
Genetic diversity role in disease
Needed for alleles conferring disease resistance
Competition causing extinction
Competition causing extinction
Outcompeted by species with advantageous mutations
Catastrophic events causing extinction
Catastrophic events causing extinction
Can instantly wipe out entire species
Examples of catastrophic events
Examples of catastrophic events
Volcanoes, earthquakes, tsunamis, asteroid impacts
Habitat destruction causing extinction
Habitat destruction causing extinction
Species die if unable to migrate or adapt to new environment
Six factors that can cause extinction
Six factors that can cause extinction
Environmental changes, new predators, new diseases, competition, catastrophic events, habitat destruction