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kingdom of multicellular eukaryotic organisms that do not have cell walls, feed heterotrophically and are motile. All higher animals reproduce sexually.
(also called pith rays) sections of the medulla that occur between the vascular bundles.
a mass of undifferentiated cells resulting from uncontrolled mitotic cell division in body...
water that falls to earth in any form, such as rain, snow, hail and sleet.