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the non-living ground tissue with thick-walled cells that gives strength, support and protection to a plant. Cells occur as fibres and sclereids.
the destruction of a donated organ by the immune system of the recipient.
a microscopic hair-like extension of the cell membrane of the epithelial cells forming the outer...
(SO2) a colourless gas that smells of rotten eggs or burnt matches and is produced by...
a reproductive structure in fungi that is a bit like a seed. But unlike a seed, it can be...