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(also called secondary meristems) regions of cells capable of dividing to form new cells in the roots or stems of plants.
a measure showing the number of dependents (aged 0-14 and over the age of 65) to the total...
any disease that is caused by a virus or a bacterium or any other micro-organism.
the condition in which a persons' normal capacity to think or act is affected due to the...
single-celled organisms with all life functions performed within the cell.
the small amount of air that always remains in the lungs during breathing.