Name the microbe behind curd, cheese, bread, beer and vinegar; follow sewage through primary, secondary and sludge stages and water through chlorination, ozone and UV; and match each bio-control agent to its pest.
Unit 7 carries 2 of the 40 zoology marks; with two chapters sharing them, this one averages one (MEC publishes weights by unit, not by chapter). MEC scope: Dairy and beverage microbes; Sewage and drinking-water treatment; Bio-control agents. It is asked three ways:
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See the plansZoology 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.
Human Physiology: The Highest-Yield Zoology Facts
The most repeated human-biology facts — hormones, blood, nerves, vitamins — condensed for rapid revision.
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.