BIOL 1202 : Exam 2 Notes
Document Summary
Microbes: living and nonliving entities- too small to be seen clearly without a microscope: prokaryotes range in size 0. 2-10. 0 micrometers (microns, unicellular eukaryotes still exist by the millions today. 10-100microns: they do overlap in their extremes. How big is a micrometer: 1/1,000,000 of a meter, the period" at the end of a sentence is about 1000um (1mm) Multicellular eukaryotic cells- make up us: 70% of glucose production on this planet, has coiled mass of circular dna- nuclear zone, no nucleus bc no nuclear membrane. E. coli has co-evolved to live within us. Beneficial within your gut parasitic when ingested. Very few bacteria actually cause human disease: we know the most about bacteria that can make us/animals sick. Which organisms are members of the domains archaea and bacteria: 12000 species described, may be 100-1000x that number, 1st organisms to appear on earth- 3. 9-4. 1 billion years ago. Ribosomal rna is used for protein synthesis. Sequences between bacteria and archaea are very different.
