The difference between a multicellular organism and a colonial organism is that individual one-celled organisms from a colony can, if separated, survive on their own. so yes colonial organisms can live on their own.
I don't think that is right !!! .....some planktons can be eaten and it is not release cO2 back in air. so false !
I'm so sorry but, I don't know that question well I do but I don't know how to word it. sorry buddy!!
