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in plants: the first plant to become established in an area.in plants: the first plant to become...
the cylinder of parenchyma found from the centre of the stem to the inside of the vascular...
found in the cell wall of xylem cells where the secondary cell wall is absent but the primary...
an endocrine gland attached to the base of the hypothalamus, which secretes hormones that play a...
the kingdom of multicellular organisms that contain chlorophyll and make their own food by...