BIOLOGY 1A03 Lecture Notes - Lecture 3: Robert Hooke, Prokaryote, Biome

• School: McMaster University
• Department: Biology
• Course: BIOLOGY 1A03
• Professor: Rosada Silva

Document Summary

First cell was prokaryotic, became a eukaryotic with nuclei. Robert hooke (1605) magnified objects up to 30x. Microscopes (micrographia) -> illustrated ticks, leafs etc . Used to examine bark , and named chambers cells : cork from oak tree ( chambers were invisible to the eye) Anton an leeuwenhoek developed superior lenses 300x magnification. Advancement in microscopy ( electron microscopy) nm level. All cells have genes which are expressed at different times. Plant cells cell walls, vacuole, and chloroplast. Animal cells mitochondria, cell membrane, golgi apparatus. Example: endoplasmic reticulum in great amount = protein synthesis. Animal testes produce testosterone and export lipid soluble signals. Plant root cell ( stores storage starch) Estimate of ten trillion cells ( eukaryotic ) 10 x more bacterial ( prokaryotic cells) as eukaryotic cells : 100 trillion. Many perform various functions; however can become dangerous when in unnatural locations. Tested cells from natural born (some bacteria exposed from canal birth) , and c-section children.