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cells that are formed during secondary growth by the vascular cambium ring just to the inside of the primary phloem.
special chemical molecules that transmit nerve impulses across a synapse.
a kingdom of plant-like unicellular and multicellular organisms that do not contain chlorophyll...
vascular tissue that conducts food substances from the leaves to other parts of the plant. The...
(SO2) a colourless gas that smells of rotten eggs or burnt matches and is produced by...