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a naturally occurring sequence of organisms from the various trophic levels that feed on each other.
a pattern of abnormalities found in babies born to mothers who drank excessive amounts of...
the spread of cancer cells from the original (primary) malignant tumour to other parts of the...
organisms whose cells have a true nucleus and true organelles. These structures are not...
a hormone produced by the pituitary gland, which helps to limit the amount of water lost from...
graphical representation of various aspects of food chains.