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an infectious disease of the digestive system that is characterised by diarrhoeaandbloodinthe faeces; it is caused by Entamoeba histolytica
two or more forms of a particular chemical element, that have the same number of protons in the...
the growth of cities due to the influx of people from rural areas.
(also called pith rays) sections of the medulla that occur between the vascular bundles.
joints tha tallow limited movement e.g. between vertebrae.
multicellular marine algae.