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a type of nuclear division during which somatic cells divide into new cells for growth or to replace dead cells. The chromosome number remains constant during this process.
emitting (or giving off) radiation energy, which is harmful to living organisms.
specialised heart muscle tissue between the right atrium and right ventricle which conducts the...
kingdom of multicellular eukaryotic organisms that do not have cell walls, feed...
the difference between the concentrations of a specific molecule in two adjacent areas.