ecosystem: a communtiy of interdependant organisms and the physical environment they inhabit
population: a group of organisms of the same species living in the same area at the same time, and which are capable of interbreeding
community: a group of the same species living and interacting with each other in a common habitat
niche: where organisms live and work i.e bees
the exercise we did on this was to create our own ecosystem with populations, communities, niches..ect
some pages in the textbook that might help are pages 176-177
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