Cell biology is the study of the physiological properties of cells and their interaction with each other and their environment, on the microscopic and the molecular level. Cell biology researches both single-celled organisms like bacteria and specialized cells in multicellular organisms like humans.
... the world by volume, the Parana[?] with its impressive Iguaçu[?] falls, the Rio Negro, São Francisco[?], Xingu, Madeira and the Tapajós[?] rivers.
Situated along th ...