WBCHSE HS Biological Science case studies
WBCHSE HS Biological Science · Put your knowledge to work in context.
The WBCHSE Higher Secondary Biological Science course is the Class XII biology subject offered under the West Bengal Council of Higher Secondary Education, usually taught in Bengali or English and examined in the language of instruction. It is taken by science-stream students who have completed Class XI and who need a biology qualification for university admission in life sciences, agriculture, nursing, pharmacy, medicine-adjacent pathways, or for competitive examinations. The WBCHSE HS Biological Science case studies are 5 cases and about 3,872 words.
1A Tomato Testcross That Refuses to Fit 1:1:1:1
A school genetics project uses two true-breeding tomato lines: one tall with round, red fruit, the other dwarf with oblong, yellow fruit. The F1 from the cross is uniformly tall with round red fruit.
803 words, about 4 min2Should a Tomato Grower Buy CO2 Enrichment or Better Cooling?
A polyhouse tomato grower near Nadia wants to buy a CO2 enrichment system. The seller claims that raising CO2 from 400 to 800 µmol mol−1 will 'double photosynthesis'.
763 words, about 4 min3Blood Gases in a Trekker Who Ascended Too Fast
A 24-year-old trekker from Kolkata flies to Leh (3,500 m) and treks to 4,500 m. On the first morning at 4,500 m he has headache and nausea.
748 words, about 4 min4Choosing One Restoration Measure for a Hypereutrophic Urban Lake
A 12-hectare urban lake receives treated sewage and storm runoff. Summer monitoring gives Secchi depth 0.4 m, total phosphorus 190 µg L−1, chlorophyll a 55 µg L−1, and hypolimnetic dissolved oxygen below 2 mg L−1.
728 words, about 4 min5When an Enzyme Endpoint Assay Gives Two Different Answers
A Class XII student investigates salivary amylase using the starch–iodine endpoint. A 1% starch solution is mixed with diluted saliva at different temperatures, and every 30 s a drop is tested on a spot plate until the blue colour disappears.
830 words, about 4 min