meaning of impulse ,dwarf ,coordination, excretion, phloem and xylem .
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impulse -a sudden strong and unreflective urge or desire to act.
dwarf -a person who is of unusually or abnormally small stature because of a medical condition; a person affected by dwarfism. a very short person.
coordination -the organization of the different elements of a complex body or activity so as to enable them to work together effectively.
excretion - the process of eliminating or expelling waste matter.
phloem -the vascular tissue in plants which conducts sugars and other metabolic products downwards from the leaves.
xylem -the vascular tissue in plants which conducts water and dissolved nutrients upwards from the root and also helps to form the woody element in the stem.
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