The New Encyclopędia BritannicaEncyclopędia Britannica, 1983 - Encyclopedias and dictionaries |
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Page 11
... selection territorial defense ability to subdue larger prey get a firm foothold on the bark of the tree ; the tail feath- ers are stiff and serve to prop the bird in position while it bores ; boring and flaking are done by a stout and ...
... selection territorial defense ability to subdue larger prey get a firm foothold on the bark of the tree ; the tail feath- ers are stiff and serve to prop the bird in position while it bores ; boring and flaking are done by a stout and ...
Page 14
Attempts to in- validate natural selection Sickle cell Intensity of selection Imperfect and excessive adaptation Nonadap-. into fewer - toed , high - crown toothed grazers ; lastly , one- toed grazers were the surviving type . This ...
Attempts to in- validate natural selection Sickle cell Intensity of selection Imperfect and excessive adaptation Nonadap-. into fewer - toed , high - crown toothed grazers ; lastly , one- toed grazers were the surviving type . This ...
Page 17
... selection would act against their possessors . Spe- cies can overcome this difficulty by rendering the advan- tageous effects of such pleiotropic genes dominant and their disadvantageous effects recessive or by the selection of other ...
... selection would act against their possessors . Spe- cies can overcome this difficulty by rendering the advan- tageous effects of such pleiotropic genes dominant and their disadvantageous effects recessive or by the selection of other ...
Contents
would become the principal reserve asset while gold | 36 |
Excretion the elimination of the waste products of | 50 |
Volumes | 431 |
Copyright | |
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Common terms and phrases
acid activity amount animals appears become blood body called carried cause cells century changes chemical close common complete consists containing continuous countries depends direction early effect evidence evolution example existence farm federal ferns fibres field Figure fire function gametophyte give groups important increase interest Italy kidney known later leaves less light lines living major marriage material means ment method move movements muscle natural normal obtained occur organs origin percent period person plants position possible present pressure problems produced properties protection reduced remain renal response result retina selection similar social species structure supply surface temperature tend tion types United urine usually various vary