St Gr. Two gardeners compared their tomato crops. Both grew 10 plants of the same Marks 2013 variety in a greenhouse. Q5 (a) One gardener altered the environmental conditions in his greenhouse to increase ii & the rate of photosynthesis. His plants yielded 720 tomatoes. (b) The other gardener only produced 480 tomatoes. (ii) Describe two changes to the environmental conditions in the greenhouse which 1 could have increased the rate of photosynthesis. 1 2 (b) (ii) Name a tissue in the leaves of plants in which photosynthesis takes place. 1 Question Acceptable Answer Not Mark acceptable 5 (a) Increased carbon dioxide / temperature / water / 1 moisture / humidity / light / fertiliser Any two (must include increase, or equivalent) (b) ii Mesophyll / spongy mesophyll / palisade Guard cells / 1 mesophyll / palisade / lower epidermis upper epidermis / spongy layer Int 2 The diagrams below show four experiments used in an investigation into the Marks 2011 conditions needed for photosynthesis.
St Gr. 2013 Q5 (a) ii & (b) Two gardeners compared their tomato crops. Both grew 10 plants of the same variety in a greenhouse. One gardener altered the environmental conditions in his greenhouse to increase the rate of photosynthesis. His plants yielded 720 tomatoes. The other gardener only produced 480 tomatoes. Marks (ii) Describe two changes to the environmental conditions in the greenhouse which could have increased the rate of photosynthesis. 1 2 1 (b) (ii) Name a tissue in the leaves of plants in which photosynthesis takes place. 1 Question Acceptable Answer Not acceptable Mark 5 (a) Increased carbon dioxide / temperature / water / moisture / humidity / light / fertiliser Any two (must include increase, or equivalent) 1 (b) ii Mesophyll / spongy mesophyll / palisade mesophyll / palisade / lower epidermis Guard cells / upper epidermis / spongy layer 1 Int 2 2011 The diagrams below show four experiments used in an investigation into the conditions needed for photosynthesis. Marks
Biology-N5-Past-Paper-Questions-Cell-Biology1.docx