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a substance found in certain fatty foods or manufactured in the liver. High levels of cholesterol in the blood are thought to be linked to heart disease.
the use of modern technology to manipulate living organisms to obtain products from them that...
three pairs of exocrine glands which secrete saliva into the mouth.
structure in animal cells thought to form the spindle fibres during cell division.
a species that helps scientists identify the age of sedimentary rocks.