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fats that are solid at room temperature and are found in animals. They are thought to be linked to heart disease.
an international agreement to phase out the use of CFCs, signed by 49 countries in Montreal,...
the main force responsible for the upwards movement of water in the xylem.
identical strands of a chromosome produced by the doubling of genetic material during cell...
long threads of genetic material (DNA and histone) found in the nucleus of a non-dividing cell...
birds without a keel on their breastbones and therefore unable to fly, for example ostriches....