To pass a disease from one person to another.
transmit (a disease)
A plant or animal group whose members all have similar or general features.
species
A plant or animal that lives in or another type of animal and feeds on it.
parasite
not harmed or affected by something
resistant
the practice or science of adding genes to a living thing
genetic engineering
to become infected with a disease
contract
a structure that exists in cells, often as one of a pair
chromosome
a natural chemical produced by animal and plant cells
enzyme
a plant or animal that has had its genetic structure changed
genetically modified
