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action adapted admit allied altered appear artificial selection Asa Gray beauty become bees Beneficence birds body brain breeds butterflies cause changes character Chauncey Wright colour comets correlated course creation creatures Darwin descended difficulty Divine earth effect embryo evolved existence external conditions fact feathers female force forms G. H. Lewes genera geological habits heat higher human Huxley hypothesis individual inheritance insects instance instinct intelligence less living things lower male mammals man's marsupials matter mental mind modified moral motion Natural Selection naturalists necessary never offspring Oolite organism Origin of Species parent peculiar perfect phenomena pigeons plumage possess present Principles of Biology probably produced purpose quadrupeds reason relations resemble result rudimentary savage seems sexes sexual selection Silurian special creation Spencer stage strata structure struggle suppose teeth teleology tion truth variations variety vegetable Wallace whole wings wisdom
Page 125 - There is grandeur in this view of life, with its several powers, having been originally breathed by the Creator into a few forms or into one; and that, whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been, and are being evolved.
Page 130 - When we no longer look at an organic being as a savage looks at a ship, as something wholly beyond his comprehension; when we regard every production of nature as one which has had a long history...
Page 108 - Nothing at first can appear more difficult to believe than that the more complex organs and instincts should have been perfected, not by means superior to, though analogous with human reason, but by the accumulation of innumerable slight variations, each good for the individual possessor.
Page 128 - To my mind it accords better with what we know of the laws impressed on matter by the Creator, that the production and extinction of the past and present inhabitants of the world should have been due to secondary causes, like those determining the birth and death of the individual. "When I view all beings not as special creations, but as the lineal descendants of some few beings which lived long before the first bed of the Silurian system was deposited, they seem to me to become ennobled.
Page 84 - I may be allowed to personify the natural preservation or survival of the fittest, cares nothing for appearances, except in so far as they are useful to any being. She can act on every internal organ, on every shade of constitutional difference, on the whole machinery of life. Man selects only for his own good : Nature only for that of the being which she tends.
Page 143 - Von Baer found that in its earliest stage, every organism has the greatest number of characters in common with all other organisms in their earliest stages ; that at a stage somewhat later, its structure is like the structures displayed at corresponding phases by a less extensive multitude of organisms ; that at each subsequent stage, traits are acquired which successively distinguish the developing embryo from groups of embryos that it previously resembled — thus step by step diminishing the...
Page 112 - Every body continues in its state of rest, or of uniform motion in a straight line, unless it is compelled to change that state by forces impressed upon it.
Page 181 - ... each annually scattering its seeds by the thousand ; what war between insect and insect — between insects, snails, and other animals with birds and beasts of prey — all striving to increase...