The most repeated human-biology facts — hormones, blood, nerves, vitamins — condensed for rapid revision.
Human biology is the single largest unit in Zoology (about 14 of 40 questions). These facts repeat year after year.
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See the plansHuman Biology and Physiology: Unit Map and Reading Order
What the Human Biology unit covers, how its 15 questions spread over eight systems, and the order to read the chapter notes in.
Zoology Rapid Revision — Numbers, Ratios & Sequences
Human physiology values, genetic ratios, hormone-to-gland maps and the classification characters MECEE-BL tests — the recall layer of the 40-mark Zoology block.
Classification of the Animal Kingdom
Phylum-by-phylum diagnostic features from Porifera to Chordata, with examples.
Origin of Life: From Hot Dilute Soup to the First Amino Acids
How Oparin and Haldane argued life was built up chemically on a young Earth, and how Miller and Urey tested that idea with four gases and a spark in 1953.