Bihar BSEB Intermediate Biology study plan
Bihar BSEB Intermediate Biology · Give each week a clear focus.
8 weeks · About 6 hours per week
Reproduction (sexual reproduction in flowering plants, human reproduction, reproductive health)
Draw and label the complete life cycle of an angiosperm from microsporogenesis through double fertilization, naming every structure and ploidy level without consulting notes.
Sequence the events of human spermatogenesis and oogenesis side by side, stating where meiosis stalls in each and how many functional gametes result per primary cell.
Trace the hormonal cascade of the menstrual cycle (GnRH, FSH, LH, estrogen, progesterone) and predict what happens to ovulation if LH surge is blocked.
Explain implantation, placenta formation and the three trimesters in 150 words each, using correct embryological terms.
Your checkpoint
A single hand-drawn flowchart sheet covering angiosperm sexual reproduction and the human reproductive cycle, self-tested by covering labels and reproducing them from memory.
Reproduction (sexual reproduction in flowering plants, human reproduction, reproductive health) & Genetics and Evolution (principles of inheritance and variation, molecular basis of inheritance, evolution)
Define each reproductive health term (ART, IUI, ZIFT, GIFT, ICSI, MTP, amniocentesis, lactational amenorrhea) and match each to the clinical situation it addresses.
Solve 15 monohybrid and dihybrid crosses including test crosses, writing genotype ratios and phenotype ratios for each.
State Mendel's laws and identify which law is violated by linkage and by incomplete dominance, giving one worked example of each.
Explain the chromosomal basis of sex determination in humans and contrast it with honeybee haplodiploidy.
Your checkpoint
A 20-question self-made problem set on Mendelian genetics and reproductive health, solved with working shown and errors annotated in red.
Genetics and Evolution (principles of inheritance and variation, molecular basis of inheritance, evolution)
Describe the Meselson-Stahl experiment step by step and state the banding pattern expected after one and two generations.
Outline DNA replication, transcription and translation, naming the enzymes and the direction of synthesis at each step.
Distinguish the three classes of point mutation (silent, missense, nonsense) and predict the protein consequence of a given codon change.
Explain the lac operon in the presence and absence of lactose, and contrast it with eukaryotic gene regulation by transcription factors.
Summarize the evidence for evolution from fossils, homologous organs, biochemical similarities and Hardy-Weinberg equilibrium calculations.
Your checkpoint
A one-page molecular biology cheat sheet plus three solved Hardy-Weinberg problems with allele and genotype frequencies calculated.
Biology and Human Welfare (human health and disease, microbes in human welfare, strategies for enhancement in food production) & Biotechnology (principles and processes, applications)
Classify the major human pathogens (Plasmodium, Ascaris, Wuchereria, HIV, Salmonella) by group, vector or mode of transmission, and disease caused.
Explain the immune response distinguishing innate from acquired immunity, and describe how vaccines and interferons act.
Describe the steps of recombinant DNA technology in order: restriction digestion, ligation, transformation, selection and screening.
Explain how Bt cotton, RNA interference and PCR-based diagnostics are applied, and state one ethical concern for gene therapy.
Your checkpoint
A table of 15 diseases with pathogen, transmission route and prevention, plus a labelled diagram of the recombinant DNA workflow.
Ecology (organisms and populations, ecosystem, biodiversity and conservation, environmental issues)
Distinguish population growth models (exponential vs logistic) and calculate population size under given r and K values.
Describe energy flow and nutrient cycling in an ecosystem, and quantify a food chain using the 10 percent rule.
Define the four levels of biodiversity and compare in-situ with ex-situ conservation strategies.
Explain the causes and consequences of ozone depletion, greenhouse effect, eutrophication and biomagnification with one Indian example each.
Your checkpoint
A written 300-word answer to a past-paper style ecology question, timed at 15 minutes, plus a solved energy-flow numerical.
Cell Structure and Function (cell: the unit of life, biomolecules, cell cycle and cell division)
Draw and label a plant and an animal cell, contrasting cell wall, plastids, vacuole and centrosome.
Describe the fluid mosaic model of the membrane and the functions of each organelle in protein synthesis and secretion.
Classify biomolecules by type and test, and explain enzyme kinetics including competitive and non-competitive inhibition.
Sequence the phases of mitosis and meiosis and state the cytological event that creates genetic variation in meiosis I.
Your checkpoint
A labelled diagram set of mitosis and meiosis with a written comparison of chromosome number and DNA content at each stage.
Plant Physiology (transport in plants, mineral nutrition, photosynthesis, respiration in plants, plant growth and development) & Human Physiology (digestion and absorption, breathing and exchange of gases, body fluids and circulation, excretory products, locomotion and movement, neural control, chemical coordination)
Explain water and mineral transport including root pressure, transpiration pull and the cohesion-tension theory.
Write the balanced overall equation for photosynthesis and for aerobic respiration, naming the site and products of each stage.
Describe the role of auxin, gibberellin, cytokinin, ABA and ethylene in one developmental process each.
Outline digestion, gas exchange and nephron function, naming the enzyme or transport step at each stage.
Your checkpoint
A comparative summary sheet of photosynthesis and respiration (site, reactants, products, ATP yield) plus a labelled nephron diagram.
Reproduction (sexual reproduction in flowering plants, human reproduction, reproductive health) & Genetics and Evolution (principles of inheritance and variation, molecular basis of inheritance, evolution) & Ecology (organisms and populations, ecosystem, biodiversity and conservation, environmental issues)
Re-attempt every previously wrong question from weeks 1 to 7 and record why the correct option is correct.
Complete two full-length timed mock papers under exam conditions and score them.
Rank all eight domains by mock accuracy and spend the final sessions on the two weakest.
Recite the key numerical constants, equations and named experiments from memory in a 20-minute self-quiz.
Your checkpoint
Two scored mock papers with an error log listing each mistake, its domain and the corrected concept.
Milestones
Week 2: Can reproduce the human reproductive hormone cascade and solve a dihybrid cross unaided in under 10 minutes.
Week 4: Scores at least 70 percent on a self-made 30-question test spanning Domains 1 to 4.
Week 6: Can draw and label plant and animal cells and both division types from memory with no more than two omissions.
Week 8: Both mock papers completed within time, with accuracy above 60 percent and no domain below 50 percent.