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a disease that lasts for a long time.
the non-living ground tissue with thick-walled cells that gives strength, support and protection...
(also called homeostatic control) the self-regulation and maintenance of a constant stable...
an extreme shortage of food over a large area which affects a large number of people.
sharp-edged modified last upper premolar and the first molar in carnivores adapted to shear or...
non-indigenous species which reproduce and spread more rapidly than indigenous species. This...