organisms and their environment

bioaccumulation VS biomagnification

bioaccumulation- in individual organism, unable to excrete, strored in fatty tissues

biomagnification- across trophic levels, increases as trophic levels increases

spontaneous mutations

varying degrees of _

less resistant to _, less likely to survive, die

more resistant have selective advantage, survive and reproduce

pass down allele to offspring

over many generations, higher proportion of population have allele for _