Biology 1107, Week 1
Biology 1107, Week 1 PSYC 1101 PV
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This 2 page Class Notes was uploaded by Anderson Constant on Sunday January 24, 2016. The Class Notes belongs to PSYC 1101 PV at Georgia Regents University taught by Jennifer Headrick in Spring 2016. Since its upload, it has received 23 views. For similar materials see General Psychology in Psychlogy at Georgia Regents University.
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Date Created: 01/24/16
Living Organism Characteristics All have energy All have cells All have DNA Most can reproduce – replication Populations are continually evolving – evolution A Theory is an explanation for a very general class of phenomena or observations. Theories are composed of patterns and processes. People Schwann- animal cells, special type of nerve cells named after him, all animals made of cells Virchow- “burrowed” research from Remak showing cells came from preexisting cells Cell Theory Contributors: Robert Hooke- observed a slice of cork in 1665, first to describe a cell (cellulae) Antonie Van Leeuwenhoek- described the first living cells (animalcules) Mathias Schleidon (1838)- said that all plants “are aggregates of fully individualized, independent, separate beings, namely the cells themselves.” - Didn’t agree with theory of cells coming from preexisting cells L. Pasteur- did experiments to disprove the hypothesis of spontaneous cells Cell Theory 1. All organisms are composed of one or more cells 2. Cells arise from only previously existing cells *All cells come from previously formed cells* In 1858, Charles Darwin and Alfred Wallace - All species related by common ancestry - Characteristics of species can be modified Evolution- change in characteristics of a population over time Population- group of individuals of same species in same area, at the same time Natural Selection (survival of the fittest) - Individuals in population vary in characteristics that are heritable - In a particular environment, certain traits help them survive better or reproduce Tree of Life and Taxonomy- Phylogenetic Tree 3 domains: Bacteria, Archae, Eukarya *There are some Eukaryotic cells that only have one cell* Taxonomy- classification and naming of organisms - Scientific name of organism is genus and species ex: homo sapiens Species- evolutionarily independent population or group of populations, with members that can interbreed and are characteristically different than members of other species
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