(i) The genetic constitution of an organism.   (ii) The tissue responsible for the ascent of sap in plants.   (iii) The part of the eye responsible for its shape.   (iv) The part of the chloroplast where the dark reaction of photosynthesis takes place.   (v) The kind of animal tissue found lining the respiratory organs.   (vi) The gland in the skin that secretes sebum.   (vii) The pressure which is responsible for the movement of water molecules across the cortical cells of the root.   (viii) The blood vessel which carries oxygenated blood to the liver.