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a molecule found inside red blood cells that can carry both oxygen and carbon dioxide.
the cell organelle responsible for manufacturing and transporting protein and lipids.
meristem that produces a layer of bark on the outer surface of a plant.
a connected network of vessels and glands, which carry lymph throughout the body.
an enzyme that catalyses (speeds up) the hydrolysis (breaking) of a chemical bond.
when humans construct or alter the genome of an organism.