A manual of zoologyWilliam Blackwood & Sons, 1878 |
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Página 2
... period , however , some confusion was created by the necessity of employing the term " organic " for accumula- tions of inorganic matter which had at one time entered into the composition of living beings . Thus , limestone is in one ...
... period , however , some confusion was created by the necessity of employing the term " organic " for accumula- tions of inorganic matter which had at one time entered into the composition of living beings . Thus , limestone is in one ...
Página 3
... period after life has departed . Sugar , for example , is an organic product ; but in itself it is of course dead , and it retains its stability after the organism which produced it has lost all vitality . The following are the more ...
... period after life has departed . Sugar , for example , is an organic product ; but in itself it is of course dead , and it retains its stability after the organism which produced it has lost all vitality . The following are the more ...
Página 4
... period of time ; and one or other of these con- ditions is carried out in all processes which have as their end the preservation unchanged of the organic substances which form the bodies of animals and plants . 3. DIFFERENCES BETWEEN ...
... period of time ; and one or other of these con- ditions is carried out in all processes which have as their end the preservation unchanged of the organic substances which form the bodies of animals and plants . 3. DIFFERENCES BETWEEN ...
Página 6
... period of its existence , the power of independent and spontaneous movement — a power possessed by nothing that is dead . Similarly , the chemical forces , which work unresisted amongst the particles of dead matter , are in the living ...
... period of its existence , the power of independent and spontaneous movement — a power possessed by nothing that is dead . Similarly , the chemical forces , which work unresisted amongst the particles of dead matter , are in the living ...
Página 8
... period , even though these conditions be ab- sent . These extrinsic conditions of vitality are , firstly , a cer- tain temperature varying from near the freezing point to 120 ° or 130 ° ; secondly , the presence of water , which enters ...
... period , even though these conditions be ab- sent . These extrinsic conditions of vitality are , firstly , a cer- tain temperature varying from near the freezing point to 120 ° or 130 ° ; secondly , the presence of water , which enters ...
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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