Natural Selection and Extinction Flashcards
1
Q
organisms with characteristics that make them better at competing are…
A
more likely to survive and reproduce - this means they’re more likely to pass on genes for their useful characteristics to the next generation
2
Q
define natural selection
A
the process in which a characteristic gradually becomes more (or less) common in a population
3
Q
many organisms survive because …
A
they are well-adapted for competing in their environment
4
Q
what causes species extinction?
A
a change in the environment
5
Q
why is it important to maintain the planet’s biodiversity?
A
because if one species becomes extinct, this can have a knock-on effect for other organisms
6
Q
what is a gene bank?
A
a store of the genes of different species
