Tropical nature, and other essaysMacmillan, 1878 - 356 pages |
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Page 88
... variations by which the eyes were reduced and ultimately lost must all have been useful . It is true they do manage to exist without eyes ; but that is probably because , as sight became more and more imper- fect , new instincts or new ...
... variations by which the eyes were reduced and ultimately lost must all have been useful . It is true they do manage to exist without eyes ; but that is probably because , as sight became more and more imper- fect , new instincts or new ...
Page 90
... variations occurred which tended to preserve them . Hence the curious phenomenon of insects specially attracted to certain plants to protect them from other insects ; and the existence of the destructive leaf - cutting ant in America ...
... variations occurred which tended to preserve them . Hence the curious phenomenon of insects specially attracted to certain plants to protect them from other insects ; and the existence of the destructive leaf - cutting ant in America ...
Page 111
... variations which have best adapted it among its fellows to fill that place , and to leave behind it equally well adapted successors . Reptiles and Amphibia . - Next to the birds , or perhaps to the less observant eye even before them ...
... variations which have best adapted it among its fellows to fill that place , and to leave behind it equally well adapted successors . Reptiles and Amphibia . - Next to the birds , or perhaps to the less observant eye even before them ...
Page 122
... variation in the temperate and frigid zones , and have checked all such developments of form and colour as were in the least degree injurious in themselves , or which co - existed with any constitutional incapacity to resist great ...
... variation in the temperate and frigid zones , and have checked all such developments of form and colour as were in the least degree injurious in themselves , or which co - existed with any constitutional incapacity to resist great ...
Page 123
... variation and natural selection were always able to keep the teeming mass of organisms in nicely balanced harmony with the changing physical conditions . The equatorial zone , in short , exhibits to us the result of a comparatively con ...
... variation and natural selection were always able to keep the teeming mass of organisms in nicely balanced harmony with the changing physical conditions . The equatorial zone , in short , exhibits to us the result of a comparatively con ...
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Common terms and phrases
abundant adapted adorned Africa allied Amazon animals ants Asia attract bamboo Batavia beautiful become birds blue brilliant butterflies carnivora causes changes character characteristic climate colour Colours of Animals comparatively conspicuous continent curious Danaid¿ Darwin distinct Eocene equator equatorial zone existence extensive fact families fauna favourable feet female ferns fertilization flowers foliage forests fruits genera genus greater green groups habits heat humming-birds hy¿nas immense inhabit insects Juan Fernandez land larger larv¿ leaves lemurs less light Madagascar Malay Archipelago male mammalia marsupials Miocene monkeys natural selection naturalists North northern observed occur ocean ornaments Palearctic parrots peculiar perhaps phenomena plants plumage probably produced proportion protection rays region remarkable resemble sexual selection showy slender sometimes South America species spots structure sun-birds surface tail temperate zones temperature theory tints tion trees tropical trunks Ungulata variation varied variety vegetation whole wings yellow