There are 20 mice in a 5 m2 field ecosystem. the population density of mice is 4 per m2 5 per m2 20 per m2 25 per m2

4 per m2

To find out the population density of a certain species, you must divide the number of organisms living in that habitat over how big the area is. In this case, because there are 20 mice in an ecosystem that is 5 square-meters big, then there would be 4 mice in every square-meter.

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