Problems of Evolution
Problems of Evolution
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In our eReader you can find the full English version of the book. Read Problems of Evolution Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Problems of Evolution
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This it is, and not her qualified constancy, which has effected the isolation which is the necessary condition, if noble flowers are to result from her work. For insects, un- restricted, would have been authors of confusion and chaos.
A few examples of the working of insects will show their defects as makers of species. In a field of buttercups there are often two species in blossom side by side, Ranuiicidus hiilbosus and R. Acr'is. The former begins to blossom a good deal earlier than the latt...er, but the flowering times of the two overlap. If you watch a bee among them she will often for a time keep to one species. R. Acr'u stands up a great deal higher, and, owing to this, she will often for a time pass over R. Hulbosiis. But before long she will often change her level and busy herself with the lower-growing species. In a bed of mixed polyanthus flowers bees may be seen going from one colour to another heedless of theories and of the claims of polytypic evolution. The same thing takes place when they are busy upon rhododen- drons and columbines of slightly, or even widely, different tints.
What to read after Problems of Evolution?
You can find similar books in the "Read Also" column, or choose other free books by F W Frederick Webb Headley to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
This it is, and not her qualified constancy, which has effected the isolation which is the necessary condition, if noble flowers are to result from her work. For insects, un- restricted, would have been authors of confusion and chaos.
A few examples of the working of insects will show their defects as makers of species. In a field of buttercups there are often two species in blossom side by side, Ranuiicidus hiilbosus and R. Acr'is. The former begins to blossom a good deal earlier than the latt...er, but the flowering times of the two overlap. If you watch a bee among them she will often for a time keep to one species. R. Acr'u stands up a great deal higher, and, owing to this, she will often for a time pass over R. Hulbosiis. But before long she will often change her level and busy herself with the lower-growing species. In a bed of mixed polyanthus flowers bees may be seen going from one colour to another heedless of theories and of the claims of polytypic evolution. The same thing takes place when they are busy upon rhododen- drons and columbines of slightly, or even widely, different tints.
What to read after Problems of Evolution?
You can find similar books in the "Read Also" column, or choose other free books by F W Frederick Webb Headley to read onlineMoreLess
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