The Advancement of Science: Occasional Essays & AddressesMacmillan, 1890 - 387 páginas |
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Página 11
... course , included ) been produced by the continuous operation of the same set of physico - chemical causes which alone we can discover , and which alone have been proved sufficient to produce everything else ? " " If this be so , " Mr ...
... course , included ) been produced by the continuous operation of the same set of physico - chemical causes which alone we can discover , and which alone have been proved sufficient to produce everything else ? " " If this be so , " Mr ...
Página 42
... course of change all will , I think , admit . It is actually exemplified in Appendicularia - the only adult representative of the Ascidian tadpole - still tadpole - like in form and structure , but curiously de- generate and simplified ...
... course of change all will , I think , admit . It is actually exemplified in Appendicularia - the only adult representative of the Ascidian tadpole - still tadpole - like in form and structure , but curiously de- generate and simplified ...
Página 44
... course of the Ascidian development at a geological period anterior to the present epoch . This being the case , it must be admitted that it is quite possible — I do not say more than possible — that other groups of animals besides ...
... course of the Ascidian development at a geological period anterior to the present epoch . This being the case , it must be admitted that it is quite possible — I do not say more than possible — that other groups of animals besides ...
Página 49
... course . We are as a race more fortunate than our ruined cousins - the degenerate Ascidians . For us it is possible to ascertain what will conduce to our higher development , what will favour our degeneration . To us has been given the ...
... course . We are as a race more fortunate than our ruined cousins - the degenerate Ascidians . For us it is possible to ascertain what will conduce to our higher development , what will favour our degeneration . To us has been given the ...
Página 56
... course of development from the egg , but instead of passing from the aquatic gilled condition to the terrestrial gill - less adult form of the Salamander , it remains arrested in the earlier condition , develops its reproductive organs ...
... course of development from the egg , but instead of passing from the aquatic gilled condition to the terrestrial gill - less adult form of the Salamander , it remains arrested in the earlier condition , develops its reproductive organs ...
Otras ediciones - Ver todo
The Advancement of Science: Occasional Essays & Addresses Sir Edwin Ray Lankester Vista completa - 1890 |
The Advancement of Science: Occasional Essays & Addresses Sir Edwin Ray Lankester Vista completa - 1890 |
The Advancement of Science: Occasional Essays & Addresses Sir Edwin Ray Lankester Vista completa - 1890 |
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