The Whence and the Whither of Man: A Brief History of His Origin and Development Through Conformity to Environment; Being the Morse Lectures of 1895C. Scribner's son, 1896 - 312 pagine |
Dall'interno del libro
Risultati 1-5 di 31
Pagina vi
... fish through amphibia and reptiles to mammals . The development of skeleton , appendages , circulatory and respiratory systems , and brain . -Mammals : The oviparous monotremata . -Marsupials . - Placental mammals . - Development of the ...
... fish through amphibia and reptiles to mammals . The development of skeleton , appendages , circulatory and respiratory systems , and brain . -Mammals : The oviparous monotremata . -Marsupials . - Placental mammals . - Development of the ...
Pagina xi
... fish , amphibian , and reptilian grades . The oviparous monotreme and the marsupial almost cer- tainly represent lower mammalian ancestral stages . But what kind of fish , what species of amphibian , what form of reptiles most closely ...
... fish , amphibian , and reptilian grades . The oviparous monotreme and the marsupial almost cer- tainly represent lower mammalian ancestral stages . But what kind of fish , what species of amphibian , what form of reptiles most closely ...
Pagina 11
... fish produces often many thousands , sometimes hun- dreds of thousands of eggs . Insects generally from a hundred to a thousand . Even birds , slowly as they increase , produce in a lifetime probably at least from twelve to twenty eggs ...
... fish produces often many thousands , sometimes hun- dreds of thousands of eggs . Insects generally from a hundred to a thousand . Even birds , slowly as they increase , produce in a lifetime probably at least from twelve to twenty eggs ...
Pagina 20
... fish . But the fin of its tail is hori- zontal , not vertical . Its front flippers differ altogether from the corresponding fins of fish ; their bones are the same as those occurring in the forelegs of mammals , only shorter and more ...
... fish . But the fin of its tail is hori- zontal , not vertical . Its front flippers differ altogether from the corresponding fins of fish ; their bones are the same as those occurring in the forelegs of mammals , only shorter and more ...
Pagina 21
... fish . All animals , like coral animals and starfishes , whose similar parts were arranged in lines radiating from a centre , were united as radiates , how- ever much they might differ in internal structure and grade of organization ...
... fish . All animals , like coral animals and starfishes , whose similar parts were arranged in lines radiating from a centre , were united as radiates , how- ever much they might differ in internal structure and grade of organization ...
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
advance amoeba amphibia anatomical ancestors animal kingdom annelid apes appear appetite archenteron attained become beginning better birds body brain cells cerebrum characteristics conformity to environment conscious degeneration dominant ectoderm embryo embryology entoderm experience eyes fish functions future ganglion gastrula germ-plasm give groups heredity higher animals higher forms highest human hydra important increase individual insect instinct intelligence jaws knowledge laws layer legs living locomotion lower mammals man's marsupial ment mental mind mode modified mollusks moral motives muscles muscular muscular system natural selection nephridia nerve nervous system never notochord nutriment organs oxygen parapodia perception possible primitive probably progress protoplasm protozoa purely reflex action reptiles result schematic worm segments selfish sense-organs sequence shell skeleton species spermatozoa stage structure struggle surface survive swimming theory of evolution tion tissues true truth turbellaria unselfishness variation velopment vertebral column vertebrates volvox young