A manual of zoologyWilliam Blackwood & Sons, 1878 |
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Página 9
... means necessarily demanded for the life of individuals . Thus , vege- table life is as a whole dependent upon sun - light , and though animals can subsist in darkness , animal life is in reality de- pendent upon plant - life , so that ...
... means necessarily demanded for the life of individuals . Thus , vege- table life is as a whole dependent upon sun - light , and though animals can subsist in darkness , animal life is in reality de- pendent upon plant - life , so that ...
Página 14
... means be said to be characteristic of them . Thus , many animals in their mature condition are permanently fixed , or attached to some foreign object ; and the embryos of many plants , together with not a few adult forms , are endowed ...
... means be said to be characteristic of them . Thus , many animals in their mature condition are permanently fixed , or attached to some foreign object ; and the embryos of many plants , together with not a few adult forms , are endowed ...
Página 36
... means necessary for its growth and nourishment as an inde- pendent organism . It must also be remembered that the nutritive half of the " individual " is usually , and the generative half sometimes , compound - that is to say , composed ...
... means necessary for its growth and nourishment as an inde- pendent organism . It must also be remembered that the nutritive half of the " individual " is usually , and the generative half sometimes , compound - that is to say , composed ...
Página 40
... means faultless , these terms are sufficiently convenient , if it be remembered that they are merely modifi cations of development , and express differences of degree and not of kind . An insect , such as a butterfly , is the best illus ...
... means faultless , these terms are sufficiently convenient , if it be remembered that they are merely modifi cations of development , and express differences of degree and not of kind . An insect , such as a butterfly , is the best illus ...
Página 43
... means of accounting . b . The nature of the vibrios must be looked upon as un- certain . To say the least of it , they are quite as likely to be plants as animals ; and the most probable hypothesis would place them near the filamentous ...
... means of accounting . b . The nature of the vibrios must be looked upon as un- certain . To say the least of it , they are quite as likely to be plants as animals ; and the most probable hypothesis would place them near the filamentous ...
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Outras edições - Ver tudo
Manual of Zoology ...: With a General Introduction on the Principles of Zoology Henry Alleyne Nicholson Pré-visualização indisponível - 2015 |
Palavras e frases frequentes
abdomen adult alimentary canal ambulacral amongst animal Annelides antennæ anus aperture appendages Arachnida articulated attached birds bivalve body bones Brachiopoda branchiæ branchial calcareous carapace cavity cephalothorax chitinous ciliated composed comprising consists contractile Crustacea Ctenophora developed disc distinct division dorsal embryo Eocene external extinct extremity feet females fins fishes Foraminifera fossil furnished gemmation genera genus gills head horny Huxley Hydrozoa incisors Insects integument intestine known labium larva larvæ legs limbs living locomotive males Mammals mandibles margin maxillæ membrane molars Mollusca mouth nervous system operculum organs ovum Owen pairs Paleozoic parasitic placed plates polypide polypites Polyzoa portion possess posterior present regarded reproductive Reptiles resembling respiratory Rotifera rudimentary Scolecida segments shell side Silurian single skeleton sometimes somites species spines stomach structure sub-order surface tail teeth tentacles termed thorax toes transverse tube upper usually valves ventral Vertebrates vesicle whilst wings Zoantharia zooids