4.2 Flashcards
1
Q
what is natural selection?
A
the idea that the fittest and most well adapted organisms will survie
2
Q
what is evolution?
A
the gradual change of a species overtime to make it better suited to its environment
3
Q
what is gene pool?
A
all of the alleles of all genes present in a population
4
Q
what three thins does a population rely on to adapt?
A
- the strenth of teh selection pressure
- the size of the gene pool
- the reproductive rate fof the organism
5
Q
can an orgainsm perefctly suit its environment? explain your answer:
A
no, as the environment adapts there will be a time lag for the organism to then adapt and better suti the envirnment again
6
Q
what is reproductive isolation?
A
when a geographical feature (hill, river) prevents inderviuals from breeding with others in the population
