BIOL 1002 Chapter : Biology 1002
Document Summary
Systematic and taxonomy: cell theory, species > viable and reproductive offspring, taxonomy is the branch of biologu concerned with naming and classifying the diverse forms of life on planet (10 mil) Neanderthal = last genus homo to go extinct. Microbes are too small to be seen clearly without a microscope. Prokaryotes eukaryotes range in size 10 100 um. Which organisms are members of the domains archaea and bacteria: bacteria and archaea domains, 12,000 species described, may be 100-1000x that number, 1st organisms to appear on earth, 3. 9-4. 1 billion years ago. 2 domains similar in many respects: single celled, prokaryotic, small size. Three differences between the 2 domains cell membrane lipid structure cell wall composition rrna subunit sequences. Composed of peptidoglycan (carbohydrate with amino acids attached) 70% of bacterial infections contracted in hospitals are resistant to at least one antibiotic. Fragments of circular single-stranded rna with no protein coat. Protein particle with no genetic material (i. e. dna or rna)
