What are the factors that determine

the level of harm an introduced chemical

has on the enviroment?

PLEASE ANSWER QUICKLY

i think it is dna, i'm not totally sure but i think it might be.

succession returns a disturbed

ecosystem to a more stable state. this is also classified into two (2) types:

primary succession and secondary succession. the primary succession arises when

a new land is transformed and a bare rock has been exposed providing an environment

that can be occupied for the first time. while, secondary succession occurs

when a previously occupied environment was disturbed that kills much of all its

community

explanation:

what in the weirdo : o