165. There is lymphoid tissue also located within the lining of the major tracts (respiratory, digestive and urogenital tracts) called mucosa- associated lymphoid tissue (MALT). It constitutes about in human body. per cent of the lymphoid tissue (1) Fifteen (3) 5 (2) Fifty (4) 15 166. Incorrect about the given diagram is (1) slowly developing chronic edema (2) pathogens are transmitted to a healthy person through the bite by the female mosquito (3) caused by Wuchereria, the filarial worms (4) usually affects the lymphatic vessels of the lower limbs 167. Statement -1: Isograft is done between individuals of different genetic constitution. Statement-2: Heterograft is done between individuals of same species (1) Both statement are correct (2) Statement-1 is correct and statement-2 is incorrect (3) Statement-1 is incorrect and statement-2 is correct (4) Both statement are incorrect