Highest level in classification above the level kingdom. All organisms can be assigned to one of the 3 domains bacteria, archaea, and eucarya.
Diseases that have increased in incidence in the past 20 yrs.
Organism composed of one or more eukaryotic cells; members of the domains Eucarya are eukaryotes.
cell type characterized by a membrane bound nucleus.
an organism or virus able to cause disease
Living organisms arising from non-living material
single-celled organism consisting of a prokaryotic cell; members of domains bacteria and archaea
Obligate Intracellular Parasite
An organism or other agent that can only multiply inside living cells
Cell type Characterized by the lack of a membrane- bound nucleus.
a primitive photosynthetic eukaryotic organism
Not composed of cells, Not living
1 of the 2 domains of Prokaryotes; many archea grow in extreme environments
One of the 2 domains of prokaryotes; all medically important prokaryotes are in the domain bacteria
a kind of resisting cell, characteristic of a limited number of bacterial species; highly resistant to heat, radiation, and disinfectants
a non-photosynthetic eukaryotic heteroph
Organism on or in which smaller organisms or viruses live. feed, and reproduce.
Process of deliberately altering an organisms genetic information by changing its nucleic acid sequence
Study and analysis of the nucleotide sequence of DNA
Macromolecule found only in bacteria that provides rigidity to the bacterial cel wall. The basic structure of peptidoglycan is an alternating series of 2 major subunits n-acetylmuramic acid(NAM) and N-acelylgucosamine (NAG); chains of these alternating subunits, are cross - linked by peptide chains.
Infectious protein that has no nucleic acid
Group of single celled eukaryotic organisms
Group of related isolates or strains; the lowest basic unit of taxonomy
Piece of RNA that does not have a protein coat but does replicate within living cells
acellular or non-living agent composed of nucleic acid surrounded by a protein coat.