BCS Written Zoology case studies
BCS Written Zoology · Put your knowledge to work in context.
The BCS Written Zoology paper is the subject-specific stage of Bangladesh's Civil Service (BCS) written examination for candidates who choose zoology as an optional or departmental subject. It is intended for graduates with a zoology background, or for candidates from related life-science disciplines who are comfortable with the breadth of the subject, and it serves as a screening instrument for entry into the Bangladesh Civil Service cadre system. Because the written stage is descriptive, it tests whether you can organise an argument, define terms precisely, draw and label diagrams, and connect laboratory knowledge to field and policy contexts, rather than whether you can pick one of four options. The syllabus spans cell and molecular biology, animal diversity and taxonomy, physiology and endocrinology, development, ecology and conservation, evolution, fisheries and wildlife management, parasitology and immunology, and applied biotechnology and research methods. The BCS Written Zoology case studies are 5 cases and about 2,599 words.
1Riverine fish kill after an agrochemical spill
A 14 km stretch of a slow-flowing river receives runoff from paddy fields treated with a pyrethroid insecticide and a nitrogen fertiliser. Within 48 hours, 3,200 dead fish are counted, dominated by juvenile carp and small benthic loaches; adult catfish survive.
558 words, about 3 min2Consanguinity and a recessive disorder in a village pedigree
In a rural union council, 9 of 1,400 children born over five years have a severe neuromuscular disorder. The population is endogamous; 41 percent of marriages are between first cousins.
517 words, about 3 min3Declining catch and a proposed mesh-size regulation
A coastal artisanal fishery lands 4,800 tonnes per year, down from 7,100 tonnes a decade ago, though the number of boats has risen from 900 to 1,500. Catch per unit effort fell from 42 kg per boat-day to 18 kg.
527 words, about 3 min4A vaccine trial in a flood-affected district
A district of 260,000 people has had a typhoid outbreak after flooding. A candidate conjugate vaccine is being considered.
485 words, about 2 min5Pesticide exposure and amphibian declines in a wetland complex
A wetland complex of 40 ponds supports three anuran species. Over eight years, one species has declined by 60 percent while two remain stable.
512 words, about 3 min