BIOL 121 Lecture Notes - Lecture 4: Cell Membrane, Homeostasis, Fluorine
Document Summary
Dr. chilton finishes up the lesson 1 and started the lesson 2 about the characteristic of life. Livi(cid:374)g thi(cid:374)gs . : consists of one or more cells (that contain dna, requires a constant input of energy and raw materials, conduct metabolism, grow/ develop, exhibit homeostasis, reproduce. Are the basic structural & functional (physiological) units of all living organisms. Contains dna (hereditary materials), cell membranes and ribosomes: ribosomes: protein-producing factories of cells, cell membrane: barrier between the living cell and the outside environment. Have the basically the same chemical composition. The cell(s) of all living things dna (hereditary material) = blueprint of life. The physical, chemical & behavioural characteristics of life change. Populations (of living organisms) change over the course of many generations. Evolution results in traits that promote survival & reproductive success. Evolution is possible only because of the numerous variations that exists within each species.
