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(also called pith rays) sections of the medulla that occur between the vascular bundles.
the second biological classification group (taxon) that is divided into phyla (for animals) or...
the space in the middle of the tooth which contains cells, blood vessels and a nerve.
a large domain of prokaryotic micro-organisms. They are typically a few micrometres in length...
the breaking down of large, complex food particles into smaller, soluble molecules which can be...