Biology Form Six - 100 Homework Questions & 25-Question Model Exam

Form Six Advanced Level Biology represents the culmination of advanced secondary science education in Tanzania, providing the rigorous analytical bridge touniversity faculties of medicine, pharmacy, veterinary surgery, biotechnology, and environmental sciences. Authored strictly in alignment with the Tanzania Institute of
Education (TIE) Advanced Level Biology Syllabus and the Dadisi Digital Library (Grade 6 Biology), this volume delivers complete conceptual and practical mastery
across all 9 official topics:
• Transport in Plants: Apoplast, symplast, and vacuolar pathways; Casparian strip endodermal selectivity; root pressure and guttation; cohesion-tension theory and
transpirational pull; xylem cavitation and embolism; Münch pressure-flow mass hypothesis; companion cell H+/sucrose symport; source-to-sink phloem loading and
unloading.
• Blood Circulation: Myogenic cardiac cycle; SAN, AVN delay, Bundle of His, and Purkinje conduction network; ECG vector analysis (P, QRS, T); cardiac output
regulation (Starling's Law of the Heart); blood pressure baroreflex arch; foetal shunts (ductus venosus, foramen ovale, ductus arteriosus) and neonatal circulatory
adjustments at birth.
• Growth in Plants: Eukaryotic cell cycle control; Cyclin-CDK complexes and Mitosis Promoting Factor (MPF) at G1/S and G2/M checkpoints; primary apical
meristems; secondary growth by vascular cambium (fusiform and ray initials) and cork cambium (phellogen); annual growth rings, reaction wood, and
dendrochronology; seed dormancy and germination physiology.
• Growth in Animals: Cleavage patterns and blastulation; morphogenetic gastrulation movements; ectoderm, mesoderm, and endoderm organogenesis;
extraembryonic membranes in amniotes (amnion, chorion, yolk sac, allantois); endocrine control of insect metamorphosis (PTTH, ecdysone, juvenile hormone);
amphibian thyroid-driven metamorphosis.
• Reproduction in Plants: Heterospory; microsporogenesis, pollen ultrastructure, and male gametophyte maturation; megasporogenesis, ovule anatomy, and
8-nucleate female gametophyte; double fertilisation (diploid zygote and triploid endosperm); floral co-evolution for entomophily and anemophily; apomixis,
agamospermy, and parthenocarpy.
• Reproduction in Animals: Spermatogenesis and oogenesis cytology; hypothalamic-pituitary-gonadal (HPG) neuroendocrine axis; ovarian folliculogenesis and
endometrial menstrual cycle; fertilisation cascade (capacitation, acrosome reaction, Izumo1-Juno binding, fast/slow blocks to polyspermy); blastocyst implantation;
placental endocrinology (hCG, progesterone, hPL); neuroendocrine parturition (Ferguson reflex).
• Inheritance: Semiconservative DNA replication (Meselson-Stahl, helicase, DNA pol III/I, ligase, Okazaki fragments); eukaryotic transcription and translation; gene
mutations, chromosomal aberrations, and sickle-cell anaemia; non-Mendelian epistasis; gene linkage, crossing over, and chromosome mapping; sex linkage; population
genetics and Hardy-Weinberg equilibrium calculations.
• Evolution: Lamarckism vs Darwinian natural selection; Modern Evolutionary Synthesis; directional, stabilizing, and disruptive selection; allopatric, sympatric, and
parapatric speciation; homologous vs analogous structures; molecular phylogenetics and cytochrome c sequence homology; chemical origin of life (Oparin-Haldane,
Miller-Urey, RNA world hypothesis).
• Ecology: Ecosystem energetics, Lindeman's 10% trophic efficiency rule, and ecological pyramids; biogeochemical cycles (carbon, nitrogen, phosphorus); primary and
secondary ecological succession (hydrosere, xerosere); population dynamics (exponential vs logistic carrying capacity K); r- and K-selection; competitive exclusion and
resource partitioning; conservation biology.