| Sumario: | The scientific background, the biological background, the chemical background, molecule and cell, cell and organism, species and ecosystem, habitat and biosphere, the earliest organisms, protists, plants, animal nature and noncoelomates, coelomate groups: protostomes, coelomate groups: deuterostomes, nutrition, respiration, synthesis, genetic codes, physical functions, cellular control, hormonal control, intercellular control, nervous control, behavioral control: the individual, behavioral control: the society, patterns of propagation, reproduction: nonanimal organisms, reproductions: animals, heredity, evolution, change with time, the history and races of man
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