Zoology — Last-Minute Revision
High-priority revision for the TS Inter 2nd Year Zoology board exam — key units, must-know diagrams, definitions and exam strategy. Paper: 60 marks · 3 hours.
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High-Yield Units
- •Human Anatomy and Physiology — digestion, circulation, respiration, excretion (high LAQ)
- •Reproduction — male/female reproductive system, fertilisation, embryo development (LAQ)
- •Genetics and Evolution — Mendel, Hardy-Weinberg, mutations, evolution theories (LAQ+SAQ)
- •Biotechnology — insulin production, gene therapy, CRISPR (SAQ+LAQ)
- •Ecology — food chain, ecosystem, biodiversity, environmental issues (SAQ)
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Diagrams Must-Know
- •Human digestive system — label all organs
- •Heart — 4 chambers, valves, blood flow direction
- •Kidney (nephron) — Bowman's capsule, PCT, loop of Henle, DCT, collecting duct
- •Male and female reproductive system — labelled diagrams
- •Antibody structure — 2 heavy + 2 light chains, Fab and Fc regions
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Key Definitions to Recall
- •Homeostasis — maintaining constant internal environment despite external changes
- •Hardy-Weinberg equilibrium — allele frequencies constant in absence of evolution forces
- •Opsonisation — antibody coating of antigen making it easier for phagocytosis
- •In vitro fertilisation (IVF) — fertilisation outside the body, embryo transfer inside
- •Ecological succession — directional change in community structure over time
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Common Mistakes
- •Don't confuse acquired and innate immunity in answers
- •Oviparous vs. viviparous — clear distinction with examples
- •For kidney function, mention both filtration and reabsorption stages
- •In genetics, distinguish between mutation, modification and variation
- •Placenta is not the same as amnion — state functions separately
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Exam-Day Tips
- •Diagrams get partial marks even if incomplete — always draw and label
- •For physiology questions, write the process in numbered steps
- •Definitions must be precise — vague definitions lose marks
- •Answer 'compare and contrast' with a table — faster and clearer
- •In biotechnology, mention specific organism names (e.g., E. coli for insulin production)