How can the Darwinian concept of descent with modification explain the evolution of such complex structures as the vertebrate eye?
Chapter 4: Cells: The working Units of Life Cell Theory- was the first unifying theory of biology. -Cells are the fundamental units of life -All organisms are composed of cells -All cells come from preexisting cells. Most cells are tiny, in order to maintain a good surface area- to- volume ratio. Cell Surface=2πr AND Cell Volume=πr 2 The volume of a cell determines its metabolic activity relative to time. The surface area of a cell determines the number of substances that can enter or leave the cell. The Unaided eye can see a little as a butterfly egg. Light microscope can see as little as a virus Electron microscope can see as little as an atom. - Nm= Nanometers= 10 9