Extinction (OCR GCSE Biology A, Combined (Gateway Science Suite)): Flashcards
📚Flashcards
Practise the cards
11 cards from this deck
ShowHide
Practise the cards
11 cards from this deck
What is extinction?
What is extinction?
When an entire species has died out, no individuals remain alive
How do environmental changes cause extinction?
How do environmental changes cause extinction?
Changes occur faster than species can adapt
How do new predators cause extinction?
How do new predators cause extinction?
Species unable to defend themselves or escape
Why do new diseases cause extinction?
Why do new diseases cause extinction?
Species lacks genetic diversity & resistance alleles
How does competition cause extinction?
How does competition cause extinction?
Outcompeted by species with advantageous mutations
Examples of catastrophic events causing extinction
Examples of catastrophic events causing extinction
Volcanic eruptions, earthquakes, tsunamis, asteroid impacts
How does habitat destruction cause extinction?
How does habitat destruction cause extinction?
Species can't migrate or adapt to new environment
What do competing species compete for?
What do competing species compete for?
Food sources (same resources)
How quickly can catastrophic events cause extinction?
How quickly can catastrophic events cause extinction?
Can instantly wipe out entire species
What causes habitat destruction?
What causes habitat destruction?
Human activities or natural processes
Example of environmental change causing extinction
Example of environmental change causing extinction
Climate shifts