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Chemical toxins and not cellular.
Small organisms that are usually one celled and are studied with a microscope.
study of disease and organisms causing disease.
mircoorganism was first seen by the human eye because of the work of Leeumenhoek.
discovered bacteria, algae, protozoans and fungi.
- He really begin the study of Microorganisms in the 19th century.
- came up with the Germ theory of disease.
- -discovered that fermentation is due to yeast
- -pasteurization (wine and beer)
- he didn't agree with spontaneous generation.
- (swan-necked flas experiment)
theory: life comes from nowhere
**Microorganisms do not arise by spontaneious generation in sterile infusions.
- -J.B van Helmont believer of this.
- -also , John Needham
Challenger of Spontaneous Generations
- -Fancisco Redi, first to challenge.
- (maggots do not arise spontaneously from rotting meant, but instead arise from eggs laid by flies)
(boiled infusions will remain sterile as long there are no airborne.)
The Germ Theory of Disease
: states that microogransims can invade other gorganisms and cause disease and support began to accumlate in early 19th.
: Lister and Pasteur
- pasteur- specific microbes cause specific disease.
- lister- developed an antiseptic in surgery to prevent microbes to enter the wound. (dilute phenol)
study of the bacteria
the study of viruses
the study of the fungi
study of the protozoa
study of the algae
study of parasites.
Cell size: .5-5.0 microns (um)
- normally coccus (circles) or bacillus (rods)
- some are filaments because they are unattached by undivided walls.
- lack a nucleus and membrane bound intracellular.
- Some cause diseases.
- they are everywhere.
- Procaryotic-----only bacteria
- effect: N2 nitrogen fixation
- cell size: few-100 microns
- do foul water supplies (like sea weed and stuff in pools) which brings us to that they are found in watery area.
- toxins- Ride Tide turns water red and kills fishes.
- most of time in colony.
- they are autotropic- there is chlorophyll in chloroplast.
- (primary producer or organic molecules) bottom of the chain. make oxygen.
- single celled (yeast) many (molds)
- cell wall: chitin
- absorb nutrients from the environment.
- decomposers of everything.
- sources of antibiotics. (penicillin)
- food: mushroom, cheese, alchol
- no living organism can break down this sustance.
also known as TB.
isolated causative agents of antrax, TB and cholera
- eukaryotic, and unicellular.
- they are heterotrophic (can't make their own food)
- location: water, soil and in/on the boies of other life forms.
- they cause decomposition and pathology?
- cause malaria- through flies.
1 benefit and the other is neutral.
one benefit, the other is harmed.
not all are cellular
- -they have no independent immune system
- -all viruses are obligate, intracellular parasites of host's cells.
- -1/1000 of a micron and are harmful
- they are everywhere.
- effects: negative effect.
List all Eurcaryotic
Algae, Fungi, Protozoan, Viruses
List all Prokaryotic