CHSE Odisha Elective Biology case studies
CHSE Odisha Elective Biology · Put your knowledge to work in context.
The CHSE Odisha Elective Biology examination is the written subject paper taken by +2 (senior secondary) science students in Odisha who choose Biology as an elective. It is intended for candidates completing higher secondary schooling under the Council of Higher Secondary Education, Odisha, and for private or repeat candidates preparing for the same paper. The syllabus moves from the diversity of living organisms and structural organisation through cell biology, plant and human physiology, reproduction, genetics and evolution, then applied areas: human welfare, biotechnology, and ecology. Expect a written paper mixing objective or very short items with short-answer and long-answer questions, including labelled-diagram and reasoning-based parts. The CHSE Odisha Elective Biology case studies are 5 cases and about 3,703 words.
1The Waterlogged Polyhouse: Wilting in Saturated Soil
In a polyhouse near Bhubaneswar, tomato plants of a hybrid variety are irrigated daily. After 72 hours of continuous rain the field stands under 5 cm of water and the soil temperature is 26 °C.
765 words, about 4 min2Acidosis, Hyperkalaemia and a Painkiller in Chronic Kidney Disease
A 52-year-old man from Cuttack is admitted with weakness and palpitations. He has taken ibuprofen daily for six months for knee pain and eats a high-protein diet.
705 words, about 4 min3Counselling a Family with a Rare Enzyme Deficiency
A couple from a village near Koraput seeks counselling. Their three-year-old son has progressive neurodegeneration, an enlarged liver and no detectable activity of a lysosomal enzyme on two separate assays.
769 words, about 4 min4Colchicine, Metaphase Arrest and a Temperature-Sensitive Mutant
Undergraduate students germinate onion bulbs in water at 25 °C. Root tips are treated with 0.05% colchicine for 0, 2, 4 and 6 hours, fixed in Carnoy's fluid, hydrolysed and stained with acetocarmine.
700 words, about 4 min5The Chilika Wetland: Quadrat Data, Residues and a Conversion Proposal
A 40-hectare freshwater wetland near Chilika is proposed for conversion to prawn ponds. A class samples ten 1 m² quadrats along a transect.
764 words, about 4 min