The New Encyclopædia BritannicaEncyclopædia Britannica, 1983 - Encyclopedias and dictionaries |
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Page 170
... animal life . The tundra subsoil is frozen throughout the year ; hence , burrowing animals cannot live there , and , as the tundra is partly free from snow only during the short summer , conditions for life are poor . Most animals ...
... animal life . The tundra subsoil is frozen throughout the year ; hence , burrowing animals cannot live there , and , as the tundra is partly free from snow only during the short summer , conditions for life are poor . Most animals ...
Page 804
... Animal ( B.G.S./L.B.Sm . ) Animal behaviour ( ethology ) includes any activity of an intact organism . A living animal behaves constantly in order to survive , and all animals must solve the same basic problems . They must , for ...
... Animal ( B.G.S./L.B.Sm . ) Animal behaviour ( ethology ) includes any activity of an intact organism . A living animal behaves constantly in order to survive , and all animals must solve the same basic problems . They must , for ...
Page 1038
... animals feed , to provide , as a by - product , oxygen , which most animals require for res- piration . At first , the oceans and the lands were teeming with large numbers of a few kinds of simple single - celled organisms , but slowly ...
... animals feed , to provide , as a by - product , oxygen , which most animals require for res- piration . At first , the oceans and the lands were teeming with large numbers of a few kinds of simple single - celled organisms , but slowly ...
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aesthetic ancient appear areas arms artists aschelminths Asia Asian associated atmosphere atoms become body called Central centre century changes China continued countries criticism culture early Earth East economic effect electrons elements energy example exist field forces France function Games groups head human important increase India individual industrial influence Italy Japan known later less light lines living lower major mass means ment metres military mountain nature North objects observations occur organization original painting particular percent period physical Pleistocene political population position possible practice present produced radiation range region relatively remains represent result schools social society sometimes sources South Soviet species stars structure style surface temperature theory tion traditional types United usually various West western