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a molecule that is converted to adenosine triphosphate (ATP) for energy storage.
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...
single-celled floating algae, which provide food for marine animals, such as fish and whales....
a pore in nuclear membrane that enables macromolecules to enter and leave the nucleus.
an atmospheric gas made of three oxygen molecules bonded together (O3).