1-30-141. The Biological Basis of Life: Cells and DNAa. Simplified definition of evolution inherited changes in life forms through time (Darwin’s decent with modification)b. Expanded inherited change in gene frequencies of a populations gene pool through time2. Populations evolve a. Individuals do not evolve b. Individuals are selected for or against 3. Genetic basis of evolutiona. Levels of analysisi. Species- a taxonomic group whose members can interbreed1. Population- a group of organisms of the same speciesa. Individual- a member of a populationi. Cell- component of an organism1. Molecule-comprise cellular structure 4. Cell theory a. All living things are composed of cells b. The cell is the most basic unit of lifec. All cells arise from pre-existing, living cells5. 2 Cell typesa. Eukaryotesi. Plasma membrane ii. Cytoplasmiii. Organelles iv. Nucleus b. Prokaryotes i. Plasma membrane ii. Cell wall iii. Cytoplasmiv. No true organellesv. No nucleus 6. Eukaryotic cell typesa. Somatic (body cells)i. Diploid 46 chromosomesb. Gametes (sperm and egg) i. Haploid 23 chromosomes7. 3 major regions of eukaryotic cella. Plasma membrane i. Made of phospholipid bilayer ii. Stop bad things from coming iniii. Allow water and ions to come throughb. Cytoplasmi. Factory of the cell ii. Ribosomes 1. Synthesized proteins1-30-142. Free and attached to the RER3. 2 subunitsa. Join when mRNA is presentiii. Mitochondria 1. Energy productiona. ATP production2. Medinaa. Through the mother 3. Nucleus a. Information and control center b. Store DNAi. Chromatin iv. 46 autosomes v. 2 sex chromosomes vi. Genome- all genetic information your genes carry vii. gene are on