Evolution and animal life, an elementary discussion of facts, processes, laws and theories relating to the life and evolution of animalsD. Appleton, 1908 - 489 páginas |
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Página 72
... 42 ) , or special locomotory organs ( presence of wings in the male and their [ absence in the female in numer- ous insect species ). 72 EVOLUTION AND ANIMAL LIFE ferences, 71; Classification of secondary sexual characters,
... 42 ) , or special locomotory organs ( presence of wings in the male and their [ absence in the female in numer- ous insect species ). 72 EVOLUTION AND ANIMAL LIFE ferences, 71; Classification of secondary sexual characters,
Página 73
... wing bands , tail blotches , and such other con- spicuous color spots and mark- ings possessed by the males and wanting in the females of various bird species ) , or , finally , char- acters connected with special habits of one sex ...
... wing bands , tail blotches , and such other con- spicuous color spots and mark- ings possessed by the males and wanting in the females of various bird species ) , or , finally , char- acters connected with special habits of one sex ...
Página 74
... wings in insect females , small differences in size and markings between males and females , slight differences in wing form in hummingbirds , dragon flies , and butterflies , differences in number of tarsal and antennal segments in ...
... wings in insect females , small differences in size and markings between males and females , slight differences in wing form in hummingbirds , dragon flies , and butterflies , differences in number of tarsal and antennal segments in ...
Página 121
... wing is shorter and more rounded , while the tail is longer . As these forms do not clearly intergrade with those of the mainland , and , for the most part , not with each other , they are held to represent a number of distinct species ...
... wing is shorter and more rounded , while the tail is longer . As these forms do not clearly intergrade with those of the mainland , and , for the most part , not with each other , they are held to represent a number of distinct species ...
Página 129
... wings are black and white . This species , with its subspecies , ranges through southern California and Arizona ... wings and in the number and character of the wing hooks is just as great among the bees which first come from their cells ...
... wings are black and white . This species , with its subspecies , ranges through southern California and Arizona ... wings and in the number and character of the wing hooks is just as great among the bees which first come from their cells ...
Outras edições - Ver tudo
Evolution and Animal Life: An Elementary Discussion of Facts, Processes ... David Starr Jordan,Vernon Lyman Kellogg Visualização integral - 1907 |
Evolution and Animal Life: An Elementary Discussion of Facts, Processes ... David Starr Jordan,Vernon Lyman Kellogg Visualização integral - 1907 |
Evolution and animal life, an elementary discussion of facts, processes ... David Starr Jordan,Vernon Lyman Kellogg Visualização integral - 1907 |
Palavras e frases frequentes
actual adaptation adult animals animals and plants ants apes appear artificial selection bees beetles biologists birds body breeding butterfly called causes centrosome changes CHAPTER characters chromatin chromosomes color and pattern common crab Darwin degeneration degree descent differentiation division egg cell embryo environment existence fact factors fauna female fertilized fishes forms fossils genus germ cells habit hatched heredity honeybee host hybrid individuals influence inheritance insects instinct islands isolation kinds of animals known larva larvæ live lower male mammals matter ment modified mutations natural selection naturalists nest nucleus offspring organic evolution origin Origin of Species parasites parent phenomena plasm primitive produced protoplasm Protozoa race relation reproduction reptiles resemblance Sacculina sea anemone sexual sexual selection sheep species species-forming sperm spines stage structure substance tail theory tion traits tree variation various vertebrates Weismann wings workers young