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an agent that suppresses a virus or its ability to replicate and inhibits its capability to multiply and reproduce
anti-viral/vaccine
antimicrobial agent that can kill and/ or inhibit the growth of microorganisms, especially those that are infectious or disease-causing
antibiotics
the protein shell of a virus.
capsid
an organism that does not cause disease itself but which spreads infection by conveying pathogens from one host to another
vector
widespread occurrence of an infectious disease in a community at a particular time
epidemic
an epidemic occurring worldwide, or over a very wide area, crossing international boundaries and usually affecting a large number of people
pandemic
determining the relative order of rock layers without determining their absolute age
relative dating
(of a species) no longer exists and has no living representative
extinct
a fossil that is useful for dating and correlating the rock layers in which it is found
index fossil
a similar trait shared among organisms that evolved from a common ancestor
homologous
structures that serve no apparent function but are homologous to useful structures in other organisms
vestigial structure
change over time
evolution
not living
abiotic
living or once was living
biotic
The role and position a species has in its environment
niche
the rigid outer part of the earth, consisting of the crust and upper mantle
lithosphere
