The Descent of Man, Vol. 2 of 2 (Classic Reprint): And Selection in Relation to Sex: And Selection in Relation to Sex (Classic Reprint) - Tapa blanda

Sinopsis

Excerpt from The Descent of Man, Vol. 2 of 2: And Selection in Relation to Sex

Fishes: Courtship and battles of the males - Larger Size Of the females - Males, bright colours and ornamental appendages; other strange characters - Colours and appendages acquired by the males during the breeding-season alone Fishes with both sexes brilliantly coloured - Protective colours - The less con spicuous colours Of the female cannot be accounted for on the principle Of protection Male fishes building nests, and taking charge of the ova and young. Amphibians: Differences in structure and colour between the sexes - Vocal organs. Rep tiles: Chelonians Crocodiles Snakes, colours in some cases protective Lizards, battles Of Ornamental appendages Strange differences in structure between the sexes - Colours Sexual differences almost as great as with birds.

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