Part A Explain why the forest ecosystem is a system. Use examples from the article to support your explanation.
PLS HELP ASAP!!!

Which would happen if more forests were cut down? a. the nitrogen cycle would be stopped b. nitrogen would be fixed by bacteria more quickly c. the amount of co2 in the atmosphere would increase d. fossil fuels would build up in the soil c the amount of co2 in the atmosphere would increase

Of your good in bio kusing a series of preliminary observations; pstate a problem developed from these observations, formulate a hypothesis, design an experiment to test the hypothesis

Which would be the most useful source of evidence to support mcneill's contention?