The most repeated human-biology facts — hormones, blood, nerves, vitamins — condensed for rapid revision.
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See Premium plans🐙 Classification of the Animal Kingdom
Phylum-by-phylum diagnostic features from Porifera to Chordata, with examples.
🧬 Biology, Origin and Evolution of Life
Branches of biology, the origin of life from Oparin-Haldane to Miller-Urey, and the mechanisms and evidences of organic evolution.
🐙 General Characteristics and Classification (Protozoa to Chordates)
Diagnostic features and examples of the major animal phyla from Protozoa through Chordata, with the classic comparison table.
🦟 Plasmodium, Earthworm and Frog
Life cycle of the malarial parasite plus the digestive, circulatory and reproductive organisation of earthworm and frog.