File:Evolution by atrophy in biology and sociology (1899) (14764116255).jpg

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Identifier: evolutionbyatrop00demo (find matches)
Title: Evolution by atrophy in biology and sociology
Year: 1899 (1890s)
Authors: Demoor, J. (Jean), 1867-1941 Massart, Jean, 1865-1925 Vandervelde, Emile, 1866-1938 Mitchell, Chalmers, Mrs
Subjects: Sociology Evolution
Publisher: New York : D. Appleton and Company
Contributing Library: University of British Columbia Library
Digitizing Sponsor: University of British Columbia Library

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ply dentated; in other varietiesof the same species there are only slightly dentatedleaves, while in Ranunculus fluitans the leaves areall fringed.1 (c) In a submerged plant which is to be found inMadagascar, Ouvirandra fenestralis (fig. 47), thediminution in volume, compared to the surface, iseffected in a different manner. After the leaf hasdeveloped in the ordinary way, all the parts of theleaf in between the veins of the blade disappear.This results in the blade being reduced to a delicatepiece of network, consisting entirely of communicat-ing veins accompanied by adjacent assimilative cells. 4. Adaptation to defence against ants.—In the 1 Ranunculus sceleratus grows by the water-side ; R. hederaceusis to be found on marshy ground, the internodes and petioles beingquite short; B. aquatilisgrows in shallow water, and the internodesare of sufficient length to raise the flowers out of the water ; R.fluitans grows in strongly-running streams, so that floating leaveswould be useless.
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MODIFICATION OF THE ORGANS OF PLANTS 87 tropics, especially in South America, plants aremuch exposed to the ravages of leaf-eating ants(Atta). In order to protect themselves, they provideother kinds of ants with shelter and nourishment,and this necessarily entails several modifications.

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28 July 2014


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current05:01, 9 March 2016Thumbnail for version as of 05:01, 9 March 20162,720 × 1,210 (612 KB)SteinsplitterBot (talk | contribs)Bot: Image rotated by 90°
23:10, 27 September 2015Thumbnail for version as of 23:10, 27 September 20151,210 × 2,734 (617 KB)Fæ (talk | contribs)== {{int:filedesc}} == {{information |description={{en|1=<br> '''Identifier''': evolutionbyatrop00demo ([https://commons.wikimedia.org/w/index.php?title=Special%3ASearch&profile=default&fulltext=Search&search=insource%3A%2Fevolutionbyatrop00demo%2F fin...

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