The Origin of Species by Means of Natural Selection: Or the Preservation of Favored Races in the Struggle for Life |
From inside the book
Results 1-5 of 52
Page viii
... bees - Slave - making ants - Hive - bee , its cell - making instinct - Changes of instinct and structure not necessarily simultaneous - Difficulties of the theory of the Natural Selection of instincts - Neuter or sterile insects ...
... bees - Slave - making ants - Hive - bee , its cell - making instinct - Changes of instinct and structure not necessarily simultaneous - Difficulties of the theory of the Natural Selection of instincts - Neuter or sterile insects ...
Page 90
... bees do not visit this flower . I have also found that the visits of bees are necessary for the fertilisation of some kinds of clover ; for instance , 20 heads of Dutch clover ( Trifolium repens ) yielded 2,290 seeds , but 20 other ...
... bees do not visit this flower . I have also found that the visits of bees are necessary for the fertilisation of some kinds of clover ; for instance , 20 heads of Dutch clover ( Trifolium repens ) yielded 2,290 seeds , but 20 other ...
Page 91
... bees more numerous than elsewhere , which I attribute to the number of cats that destroy the mice . " Hence it is quite credible that the presence of a feline animal in large numbers in a district might deter- mine , through the ...
... bees more numerous than elsewhere , which I attribute to the number of cats that destroy the mice . " Hence it is quite credible that the presence of a feline animal in large numbers in a district might deter- mine , through the ...
Page 93
... bee is rapidly exterminating the small , stingless native bee . One spe- cies of charlock has been known to supplant another species CHAP . III . ] 93 STRUGGLE FOR EXISTENCE ,
... bee is rapidly exterminating the small , stingless native bee . One spe- cies of charlock has been known to supplant another species CHAP . III . ] 93 STRUGGLE FOR EXISTENCE ,
Page 115
... bees , never- theless every female flower which I examined had been effectually fertilised by the bees , which had flown from tree to tree in search of nectar . But to return to our imaginary case : as soon as the plant had been ...
... bees , never- theless every female flower which I examined had been effectually fertilised by the bees , which had flown from tree to tree in search of nectar . But to return to our imaginary case : as soon as the plant had been ...
Other editions - View all
Common terms and phrases
adapted affinities allied species America ancient appear Asa Gray beak become bees believe belonging birds breeds cause cells characters climate closely allied colour common continent crossed crustaceans degree developed difficulty distinct species domestic doubt effects eggs embryo existing extinct extremely facts favourable fertilised fertility flowers formation forms fossil Fritz Müller genera genus geological geological period Glacial period gradations greater number groups of species habits Hence hybrids important individuals inhabitants inherited insects instance instincts intercrossing intermediate kind lamellæ larvæ less living males mammals manner marsupials migration modified descendants natural selection naturalists nearly nest occasionally offspring organisation organs parent peculiar perfect pigeon pistil pollen present principle probably produced progenitor quadrupeds ranked remarked resemblance rudimentary seeds sexual selection Silurian slight South America stamens sterility structure successive supposed swimbladder tend theory tion trees variability variations varieties vary whilst whole wings young