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a plant body consisting of one or more cells. It is not differentiated into root, stem and leaves.
the main blood vessel that returns deoxygenated blood from the head and thorax to the right...
(also called secondary meristems) regions of cells capable of dividing to form new cells in the...
an individual who donates an organ for the purpose of transplanting it into another person in an...
water that falls to earth in any form, such as rain, snow, hail and sleet.