When Dalton proposed the first atomic model, he was thinking that all atoms are alike. The correct answer is A.
False. An ecosystem consists of all the living organisms as well as the nonliving components such as air, water and soil. But technically it does contain all the populations of different species, the definition is just missing a component.
They allow the heart to pump more blood by decreasing the ESV.
Structure and function-there are only TWO types of cells-prokaryotic and eukaryotic