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Biology Revision Questions A Level Mid Term Three 2025

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PDF 737.64 KB 9 pages Jul 23, 2026
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BIOLOGY DEPARTMENT SET 03 EXAM GUIDING RESPONSES S.4 BIOLOGY For a comprehensive CBC item bank with responses for both theory and practical items, consultation, facilitation, guides, etc , WhatsApp/Call 0748656556 JBA JACOB SECTION A Answer all items in this section. Item 1 Salongo Leonard is a large scale coffee farmer in Dangoma village. This year he is likely to make huge losses, as his plantations are affected with prolonged dry spell. In addition to that, a new nearby chemical factory released chem icals into his garden. The plants showed stunted growth, poor root development, leaves turned yellow and drying and Flowers fell off prematurely. To avoid total loss, Salongo Leonard invited a crop scientist to his plantations; in his advice, the scientist emphasized continuous application of water mostly at the base of the plant and application of fertilizers for at least once a month to improve on leaf condition and for higher crop yields. Task (a) Mention the plant processes that were affected by the cl imatic condition.  Photosynthesis  Transpiration  Absorption of water and mineral salts  Gaseous exchange  Fertilization (b) Explain the plant processes that were affected by the prevailing conditions in the garden.  Photosynthesis ; Reduced because water deficit limited its availability as a reactant, and stomatal closure restricted carbon dioxide intake, while chlorophyll synthesis was impaired due to nutrient deficiencies such as nitrogen and magnesium, and toxic chemical effects, lowering the plant’s ab ility to capture light energy.  Absorption of water and mineral salts ; Decreased as dry soil reduced water availability, and chemical damage to root epidermal cells and root hairs impaired active and passive uptake of water and essential minerals.  Transpira tion; Lowered because stomata closed to minimize water loss, decreasing the transpiration stream that normally drives the …
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Biology Revision Questions A Level Mid Term Three 2025, is an educational document on StudyUganda.com. This resource includes: "BIOLOGY DEPARTMENT SET 03 EXAM GUIDING RESPONSES S.4 BIOLOGY For a comprehensive CBC item bank with responses for both theory and practical items, consultation, facilitation, ……" (Format: PDF) — 737.64 KB, 9 pages. Added July 23, 2026.

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