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Viruses, Bacteria, Fungi, and Protists
Terms in this set (26)
A tiny, nonliving particle that invades and then reproduces inside a living cell.
An organism on which a parasite lives.
A harmless amount of a virus that stimulates a host's immune system to fight the virus
single-celled organisms that lack a nucleus
an organism that belongs to the kingdom Protista
An organism that feeds on a living host
A living thing
Basic unit of life
A single celled organism
Made up of more than one cell.
A change in an organism's surroundings that causes the organism to react
a reaction to a stimulus
process by which organisms maintain a relatively stable internal environment
An organism that makes its own food
An organism that cannot make its own food.
increase in size
the process of change that occurs during an organism's life to produce a more complex organism
the production of offspring
Needs of living things
food, water, living space, and stable internal conditions
A small living plant or animal seen only with a microscope; a microbe
An abnormal state in which the body is not functioning normally
a disease caused by a pathogen
a medicine used to save lives because it destroys harmful bacteria and cures infections
no longer responding to medication
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