BIOL 121 Lecture Notes - Lecture 3: Rudolf Virchow, Theodor Schwann, Robert Hooke
Document Summary
1st law of thermodynamics: energy can change from one form to another. 2nd law: can change form, but there will always be a lost of heat; entropy. Symbiosis: interactions between two types of organisms food chain: 3-5 steps, nothing can eat a lionnegative entropy (life), entropy (abiotic) Honey bees:queen bee: lays eggs, stores sperm, (< 2 years, 1000 eggs), diploidworkers: Dandelion: seeds production without pollination, 50-170 seeds/head, single plant= 2000 seeds. Cell theory: all living things are composed of cells and cell products (1847) (s&s) Robert hooke: english biologist (1663), 10 years be leeuwenhoek, cell (in cork) (consist of one or more cells) Mathias schleiden: 1863 german botanist; compartments in plants had a dark spot- nuclei in cells. Theodor schwann: german physiologist; saw similar looking structure in animal tissue. Rudolph virchow: german biologist; proposed (1855) all cells arise from previously existing cells modern cell theory1. Cells are the basic structural and functional (physiological) units of all living things 2.
