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graphical representation of various aspects of food chains.
all the different ecosystems with their numerous and varied organisms.
responsible, low impact, usually small- scale travel to protected, unspoilt, natural areas and...
outer body tissue layer that forms the epithelium and nervous tissue.
symbiosis where one organism lives on another (on the outside of another).
a muscle, gland or organ capable of responding to a nerve impulse in order to bring about a...
a blood vessel that carries blood away from the glomerulus and branches to form a capillary...