Draw the structure of the human ear and label the following parts: (i) tympanum, (ii) cochlea, (iii) pinna, (iv) malleus, (v) semi-circular canals, (vi) eustachian tube.

Draw the structures of the monomers of the following polymers: (i) Polythene (ii) PVC (iii) Teflon

Draw the structures for the following compounds. (i) Ethanoic acid , (ii) Bromopentane (iii) Butanone , (iv) Hexanal

Draw a diagram of the vertical section of human eye and label the following parts : (i) cornea, (ii) iris, (iii) aqueous humour, (iv) retina, (v) ciliary body, (vi) fovea centralis, (vii) choroid, (viii) pupil, and (ix) lens.

(a) Draw a diagram of the structure of a human ovum surrounded by corona radiata. Label the following parts : (i) Ovum, (ii) Plasma Membrane, (iii) Zona Pellucida (b) State the function of Zona Pellucida.

(a) Draw the longitudinal section of a flower showing growth of pollen tube upto the embryo sac.Label the following parts : (i) Stigma (ii) Pollen tube (iii) Integument (iv) Chalazal end (v) Nucelllus (vi) Synergids (b) What is double fertilisation in Angiosperms? Why is it so called ?

(a) Draw a diagram of a mature embryo sac of an angiosperm and label the following parts in it : (i) Filiform apparatus (ii) Synergids (iii) Central cell (iv) Egg cell (v) Polar nuclei (vi) Antipodals (b) Write the fate of egg cell and polar nuclei after fertilization.

(a) Draw a diagram of a mature embryo sac of an angiosperm and label the following parts in it : (i) Filiform apparatus (ii) Synergids (iii) Central cell (iv) Egg cell (v) Polar nuclei (vi) Antipodals (b) Write the fate of egg cell and polar nuclei after fertilization.

Draw a diagram of human excretory system and label the following : (i) Urinary bladder (ii) Left kidney (iii) Left ureter

Write the following in Roman numerals: 49 (ii) 69 (iii) 72 (iv) 89 (v) 98 (vi) 92

Label the parts (i), (ii), (iii) and (iv)