The study of how an organism defends itself against disease-causing agents
The study of viruses
An organism that lives on or in a host and causes harm to the host.
A microorganism smaller than the smallest bacterium that has no cellular structure and can cause infectious disease
A cell that has a nucleus and organelles.
A single‐celled organism that lacks a membrane‐bound nucleus and specialized organelles.
The study of extremely small organisms
Lacking oxygen; referring to an organism, environment, or cellular process that lacks oxygen and may be poisoned by it.
Containing oxygen; referring to an organism, environment, or cellular process that requires oxygen.
A disease causing agent (usually bacteria or viruses).
Any substance said to accumulate in the body that is considered to be harmful or poisonous to the system.
Organisms that are unable to construct their own food from inorganic sources, and therefore must consume other organisms or organic molecules from the outside environment. Function as consumers or decomposers in food chains.
An organism capable of synthesizing its own food from inorganic substances, using light or chemical energy. Green plants, algae, and certain bacteria are included in this classification.
bacteria are ___________________
plant and animal cells are both types of ________________
yeast are also a type of __________________
all organisms in mycology are
all plants are
all animals are
most bacteria are
An organism invisible to the naked eye, especially one that causes disease.
Objects that can only be seen under magnification.
Capacity of a pathogen to cause severe disease
measles virus has _____virulence
rabies virus has ____virulence
A system of cell to cell communication that enables prokaryotes to sense and respond to density.
A prokaryote, usually from the archea kingdom, which lives in an extreme environment. Extremophiles include methanogens, extreme halophiles, and extreme thermophiles.
An organism which shows no outward signs of a pathogenic disease (but has been shown to have it in their blood, feces, or other secretions).
Not continuous; happening at intervals.
A virus that contains RNA as its genetic information, and uses reverse transcriptase to turn the RNA into DNA.