Zoology the Study of Animal Life
Zoology the Study of Animal Life
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In our eReader you can find the full English version of the book. Read Zoology the Study of Animal Life 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 Zoology the Study of Animal Life
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This means that its num- bers must be subject to constant depletion through the dangers to which they are exposed. Many individuals are devoured by enemies, many die from starvation during periods of scarcity, or from cold or heat during extremes of temperature, and the race will ultimately be propagated by those members which are best fitted to overcome and survive these troubles.
THE ORIGIN OF SPECIES 67 If external conditions remain the same, the species will remain fairly stable in its char...acter ; all the weaklings will be weeded out, and as time goes on an ever higher standard of fitness will be found amongst the survivors. But if conditions change for the whole species or for a part of it which has wandered into a new environment then a different standard of excel- lence will be required in the survivors, and a new race differing in character from the parent race will slowly come into being through the mating together of survivors possessing slightly different qualities from those called for by the old conditions.
What to read after Zoology the Study of Animal Life?
You can find similar books in the "Read Also" column, or choose other free books by E W Ernest William Macbride to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
This means that its num- bers must be subject to constant depletion through the dangers to which they are exposed. Many individuals are devoured by enemies, many die from starvation during periods of scarcity, or from cold or heat during extremes of temperature, and the race will ultimately be propagated by those members which are best fitted to overcome and survive these troubles.
THE ORIGIN OF SPECIES 67 If external conditions remain the same, the species will remain fairly stable in its char...acter ; all the weaklings will be weeded out, and as time goes on an ever higher standard of fitness will be found amongst the survivors. But if conditions change for the whole species or for a part of it which has wandered into a new environment then a different standard of excel- lence will be required in the survivors, and a new race differing in character from the parent race will slowly come into being through the mating together of survivors possessing slightly different qualities from those called for by the old conditions.
What to read after Zoology the Study of Animal Life?
You can find similar books in the "Read Also" column, or choose other free books by E W Ernest William Macbride to read onlineMoreLess
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