Which of the following is a possible path for carbon to cycle through an ecosystem? 1. Atmospheric CO2 -> animals -> factories -> fossil fuels -> plants

2. Atmospheric CO2 -> factories -> fossil fuels -> animals -> plants

3. Atmospheric CO2 -> plants -> animals -> fossil fuels -> factories

4. Atmospheric CO2 -> fossil fuels -> factories -> animals -> plants

Which two criteria must be met before scientist can use radiocarbon dating? explain your answer

The function of the excretory system is to control homeostasis and

Which of the following matches the organisms described with the correct domain? a. archaea--multicellular, eukaryotic organisms that do not have cell walls b. eukarya--single-celled and multicellular organisms, with a defined nucleus and a variety of nutritional sources c. bacteria--unicellular, eukaryotic organisms with cell walls that do not contain peptidoglycan d. bacteria--unicellular, eukaryotic organisms that always lack cell walls