Biodiversity and classification of micro-organisms notes

Micro-organisms are organisms too small to see with the naked eye. They may be unicellular or multicellular. Some cause disease; others recycle nutrients or help humans (e.g. yeast in bread-making)…

Micro-organisms do more than cause disease. They produce food in food chains, decompose dead matter, drive parts of the nitrogen cycle, and live in close partnerships called symbiosis. This section…

Pathogens are micro-organisms that cause disease. In CAPS you must be able to link each disease to its group (virus, bacterium, Protista or fungus), explain how it spreads, list key symptoms, and…

Immunity is how a plant or animal fights infection. This section links defence lines, lymphocytes, phagocytosis, vaccines and antibiotics, and why finishing an antibiotic course matters for…