What is the basic difference between simple diffusion and facilitated diffusion across a cell membrane?

yes it is   dangerous

explanation:

because that foot is discusting and could get you sick

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: