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the process whereby nutrients that have been absorbed from the digestive system are taken up by the cells and become part of the cells cytoplasm.
an organism that helps to spread a disease, but is not infected with the disease.
a method of ordering the age of different fossils, relative to each other, without working out...
a species that has been introduced into an area in which it did not previously or naturally...
an infection of the skin, caused by a parasitic mould. It causes small, red itchy circles on the...