The New Encyclopædia BritannicaEncyclopædia Britannica, 1983 - Encyclopedias and dictionaries |
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Page 831
... increase may actually represent a constant rate of change . A population that doubles its numbers in each generation seems to increase slowly from two to four to eight , and much more rapidly from 256 to 512 to 1,024 . This type of ...
... increase may actually represent a constant rate of change . A population that doubles its numbers in each generation seems to increase slowly from two to four to eight , and much more rapidly from 256 to 512 to 1,024 . This type of ...
Page 834
... increase when they are low . The causal factors are predation act- ing in combination with food shortage . Adult flatworms . Food shortage also limits the popu- lation density of freshwater flatworms ( genera Polycelis and Dugesia ) ...
... increase when they are low . The causal factors are predation act- ing in combination with food shortage . Adult flatworms . Food shortage also limits the popu- lation density of freshwater flatworms ( genera Polycelis and Dugesia ) ...
Page 997
... increase metabolism and heat production . Although the increase in metabolism resulting from re- sponses to decreases in temperature enables homoio- therms temporarily to increase heat production , animals in permanently cold areas ...
... increase metabolism and heat production . Although the increase in metabolism resulting from re- sponses to decreases in temperature enables homoio- therms temporarily to increase heat production , animals in permanently cold areas ...
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activity America animals appear areas atoms became become body called camera century changes characteristics chemical Church colour common complete compounds consists containing continued drugs early effect electrons elements energy example existence experience Family field Figure fins fishes groups human important increase individual industry Italy known later lens less light liquid living lower major material means ment methods move movement natural North object occur organic original Peking Pentecostal percent period permafrost personality pest Peter petroleum Philip philosophy photographs plants political position possible practice present printing problems production Quakers range region result rocks similar social South species structure surface temperature theory tion United usually widely