Why does natural selection cause populations to evolve?
1.the organisms that are not best suited to their environment will adapt to their environment over time to survive at higher rates
2.the organisms that are least adapted to their environment will likely reproduce at higher rates than others, causing the population to look more like them.
3.the organisms that are best adapted to their environment will likely pass on their alleles at higher rates, shifting the gene pool to resemble these individuals
4.the organisms that are both best and least adapted to the environment will pass reproduce at equal rates, causing a shift in the gene pool