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the inner region of the kidney, striped in appearance, made up of renal pyramids.
thin layer of living tissue between the xylem and the phloem, which is able to divide to make...
the development of a distinct head, with a concentration of nervous tissue and sense receptors...
single-celled algae that have two flagella and are found mainly in seawater but are also common...
a species that helps scientists identify the age of sedimentary rocks.