metx 100 - intro to microbio

lectures 1-6

what is a living microbe

1. size is less than 100 micrometers

2. must be free living, usually unicellular

3. (not considering viruses) maintains integrity throughout life

free living definition

living independently without needing a host/symbiotic relationship with another species to survive

animalcules

first historical term to describe microbes/bacteria. created by antonie van leeuwenhoek

taxonomy

classification, description, identification, and naming of organisms

phylogeny

the study of evolutionary relationships

evolutionary lineages/phylogenies are built from?

built from taxonomies/classifications, and connections of different organisms

modern phylogenies are based on?

based on genetics and genetic sequencing, and on the 3 main domains of life

3 main domains of life

1. bacteria

2. archaea

3. eukaryotes

prokaryotes vs eukaryotes

prokaryotes: has no nucleus and no membrane bound organelles. reproduces asexually via binary fission

eukaryotes: has nucleus and has membrane bound organelles. reproduces via mitosis or meiosis