The Whence and the Whither of Man: A Brief History of His Origin and Development Through Conformity to Environment; Being the Morse Lectures of 1895W. Blackwood and Sons, 1896 - 312 pagine |
Dall'interno del libro
Risultati 1-5 di 12
Pagina v
... volvox . - Embryonic development . - Turbellaria : Appearance of a body wall , of ganglion , and nerve - cords . CHAPTER III WORMS TO VERTEBRATES : SKELETON AND HEAD . 55 Worms and the development of organs . - Mollusks : The external ...
... volvox . - Embryonic development . - Turbellaria : Appearance of a body wall , of ganglion , and nerve - cords . CHAPTER III WORMS TO VERTEBRATES : SKELETON AND HEAD . 55 Worms and the development of organs . - Mollusks : The external ...
Pagina xii
... volvox , etc. - would not af this result . By a change in the form of our hist we have eliminated to a large extent the sources uncertainty and error . And the dominant function a group throws no little light on the details of anatomy ...
... volvox , etc. - would not af this result . By a change in the form of our hist we have eliminated to a large extent the sources uncertainty and error . And the dominant function a group throws no little light on the details of anatomy ...
Pagina 40
... Volvox is also a spheroidal organism , composed of- ten of a very large number of flagellated cells . But it differs from magosphæra in certain important respects . In the first place its cells have chlorophyl , the green coloring ...
... Volvox is also a spheroidal organism , composed of- ten of a very large number of flagellated cells . But it differs from magosphæra in certain important respects . In the first place its cells have chlorophyl , the green coloring ...
Pagina 41
... volvox never was an animal , it might still serve very well to illustrate a stage through which animals must have passed . The cells of volvox do not form a solid mass , but have arranged themselves in a single layer on the out- er ...
... volvox never was an animal , it might still serve very well to illustrate a stage through which animals must have passed . The cells of volvox do not form a solid mass , but have arranged themselves in a single layer on the out- er ...
Pagina 42
... volvox they are entirely subservient to , and exist for , the reproductive cells , and die when they have completed their service of these . The body is here only a vehicle for ova . Furthermore , in volvox there has arisen such an ...
... volvox they are entirely subservient to , and exist for , the reproductive cells , and die when they have completed their service of these . The body is here only a vehicle for ova . Furthermore , in volvox there has arisen such an ...
Altre edizioni - Visualizza tutto
The Whence and the Whither of Man: A Brief History of His Origin and ... John Mason Tyler Visualizzazione completa - 1896 |
The Whence and the Whither of Man: A Brief History of His Origin and ... John Mason Tyler Visualizzazione completa - 1897 |
The Whence and the Whither of Man: A Brief History of His Origin and ... John Mason Tyler Visualizzazione completa - 1899 |
Parole e frasi comuni
amoeba amphibia anatomical ancestors animal kingdom annelid apes appear appetite attained become birds body brain cavity cells cerebrum Cheaper Edition church conformity to environment conscious Crown 8vo degeneration Demy 8vo digestive dominant ectoderm embryo evolution experience eyes Fcap fish functions ganglion gastrula germ-plasm give groups higher forms highest human hydra Illustrations increase individual insect instinct intelligence laws layer legs living locomotion lower mammals man's marsupial ment mental mind mode modified mollusks moral muscles muscular natural selection nerve nervous system never notochord nutriment organs oxygen parapodia perception perivisceral Portrait Post 8vo primitive probably Professor progress protoplasm protozoa purely reflex action reproductive reptiles result schematic worm Scotland segments selfish sense-organs sequence skeleton species stage structure struggle surface survive swimming theory tion true truth turbellaria University of Edinburgh variation velopment vertebral column vertebrates vols volvox WHITHER young