Diagram and Explanation of three steps. Paster’s Two Flask experiment Two flasks used were pre-sterilised Pre-killed yeast placed in both of them One flask was open to air while the other was covered. Flask open to air had new life but not the other one. Life comes from the pre-existing life. 1½+1½ 24. a). GGAA and ggaa b).GgAa 1+1+1 c). 9:3:3:1 Male gamete + egg (n) (n) 2(n) Male gamete + 2 polar nuclei PEN (triple fusion) (n) (n) (3n) Section D a). b). As endosperm stores and supplies nutrients for developing embryo. c). Wheat – Monocot Castor – Dicot. OR 1½+1½ a). At puberty ; in seminiferous tubules of testis 25. 2+1 b). 1+1+1 26. ½x6=3
24. 25. 26. Diagram and Explanation of three steps. Paster’s Two Flask experiment Two flasks used were pre-sterilised Pre-killed yeast placed in both of them One flask was open to air while the other was covered. Flask open to air had new life but not the other one. Life comes from the pre-existing life. a). GGAA and ggaa b).GgAa c). 9:3:3:1 Male gamete + egg (n) (n) 2(n) Male gamete + 2 polar nuclei PEN (triple fusion) (n) (n) (3n) Section D a). b). As endosperm stores and supplies nutrients for developing embryo. c). Wheat – Monocot Castor – Dicot. OR a). At puberty ; in seminiferous tubules of testis b). 1½+1½ 1+1+1 1½+1½ 2+1 1+1+1 ½x6=3
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