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OriginOfSpecies - 475 Rows
Column Type #Values Column Stats
id int(11) 475 Column Stats
subject varchar(80) 14 Column Stats
title varchar(250) 139 Column Stats
ordinal int(11) 30 Column Stats
description text 474 Column Stats

475 rows, page 81 of 119 (4/p)
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Export to Excel select * from OriginOfSpecies order by subject, title, ordinal limit 320, 4 (Page 81: Row)
subject
title
ordinal
description
06 - Difficutiles in Theory 06-12 - Organs not in all Cases Absolutely Perfect 80 On the other hand, I willingly admit that a great number of male animals, as all our most gorgeous birds, some fishes, reptiles, and mammals, and a host of magnificently coloured butterflies, have been rendered beautiful for beauty's sake; but this has been effected through sexual selection, that is, by the more beautiful males having been continually preferred by the females, and not for the delight of man.

So it is with the music of birds. We may infer from all this that a nearly similar taste for beautiful colours and for musical sounds runs through a large part of the animal kingdom.

When the female is as beautifully coloured as the male, which is not rarely the case with birds and butterflies, the cause apparently lies in the colours acquired through sexual selection having been transmitted to both sexes, instead of to the males alone.
butterfly
butterfly
06 - Difficutiles in Theory 06-12 - Organs not in all Cases Absolutely Perfect 90 How the sense of beauty in its simplest form- that is, the reception of a peculiar kind of pleasure from certain colours, forms, and sounds- was first developed in the mind of man and of the lower animals, is a very obscure subject.

The same sort of difficulty is presented, if we enquire how it is that certain flavours and odours give pleasure, and others displeasure.

Habit in all these cases appears to have come to a certain extent into play; but there must be some fundamental cause in the constitution of the nervous system in each species.
06 - Difficutiles in Theory 06-12 - Organs not in all Cases Absolutely Perfect 100 Natural selection cannot possibly produce any modification in a species exclusively for the good of another species; though throughout nature one species incessantly takes advantage of, and profits by, the structures of others.

But natural selection can and does often produce structures for the direct injury of other animals, as we see in the fang of the adder, and in the ovipositor of the ichneumon, by which its eggs are deposited in the living bodies of other insects.
adder
adder

ichneumon
ichneumon


If it could be proved that any part of the structure of any one species had been formed for the exclusive good of another species, it would annihilate my theory, for such could not have been produced through natural selection.

Although many statements may be found in works on natural history to this effect, I cannot find even one which seems to me of any weight.

It is admitted that the rattlesnake has a poison-fang for its own defence, and for the destruction of its prey; but some authors suppose that at the same time it is furnished with a rattle for its own injury, namely, to warn its prey.
rattlesnake
rattlesnake


I would almost as soon believe that the cat curls the end of its tail when preparing to spring, in order to warn the doomed mouse.
cat
cat

mouse
mouse
06 - Difficutiles in Theory 06-12 - Organs not in all Cases Absolutely Perfect 110 It is a much more probable view that the rattlesnake uses its rattle, the cobra expands its frill, and the puff-adder swells whilst hissing so loudly and harshly, in order to alarm the many birds and beasts which are known to attack even the most venomous species.

rattlesnake
rattlesnake

adder
adder


Snakes act on the same principle which makes the hen ruffle her feathers and expand her wings when a dog approaches her chickens; but I have not space here to enlarge on the many ways by which animals endeavour to frighten away their enemies.
chicken
chicken

dog
dog


Natural selection will never produce in a being any structure more injurious than beneficial to that being, for natural selection acts solely by and for the good of each.

No organ will be formed, as Paley has remarked, for the purpose of causing pain or for doing an injury to its possessor.

If a fair balance be struck between the good and evil caused by each part, each will be found on the whole advantageous.

After the lapse of time, under changing conditions of life, if any part comes to be injurious, it will be modified; or if it be not so, the being Will become extinct as myriads have become extinct.