Towns A and B in Figure P3.49 are 80.0 km apart. A couple arranges to drive from town A and meet a couple driving from town B at the lake, L. The two couples leave simultaneously and drive for 2.50 h in the directions shown. Car 1 has a speed of 90.0 km/h. If the cars arrive simultaneously at the lake, what is the speed of car 2?
. Cell theory: Cell: the structural and functional unit of life How well the entire organism functions depends on individual and combined activities of all of its cells Biochemical functions of cells are directed by shape of cell and specific subcellular structures Continuity of life has cellular basis Cells differ in shape, size, and subcellular components which lead to different functions (Fig. 3.1) Erythrocytes (RBCs), epithelial, and fibroblasts connect body parts or transport gases Macrophages fight disease and skeletal muscle cells and smooth muscle cells move organs All cells have some common structures and functions . Human cells have 3 basic parts: 1. Plasma membrane: flexible outer