Forced Movements Tropisms And Animal Conduct
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In our eReader you can find the full English version of the book. Read Forced Movements Tropisms And Animal Conduct 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 Forced Movements Tropisms And Animal Conduct
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The dense ring then broke up into small agglutinated masses. In Lillie ^s opinion the formation of this dense ring of spermatozoa at the periphery of the egg-sea water is the expression of a positive chemotropism of the spermatozoa for a sub- stance contained in the egg-sea water, the ^'fertilizin.^^ He assumes that the spermatozoa near the drop of egg- sea water all swim to the egg-sea water, leaving a clear space behind them. While this explanation of the ring formation might be true — ^if su...pported by a direct chemo- tropic method like Pf effer 's — it can be shown that the ring formation is in all probability due to an entirely different Digitized by VjOOQIC CHEMOTEOPISM 151 phenomenon which has no relation to chemotropism or any other tropism.
Buller had already observed that the supernatant sea water of sea urchins contains a substance which causes the agglutination of spermatozoa.®^ A drop of sea water in which eggs had been deposited was placed upon a slide and a drop containing spermatozoa near it.
What to read after Forced Movements Tropisms And Animal Conduct?
You can find similar books in the "Read Also" column, or choose other free books by Jacques Loeb to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
The dense ring then broke up into small agglutinated masses. In Lillie ^s opinion the formation of this dense ring of spermatozoa at the periphery of the egg-sea water is the expression of a positive chemotropism of the spermatozoa for a sub- stance contained in the egg-sea water, the ^'fertilizin.^^ He assumes that the spermatozoa near the drop of egg- sea water all swim to the egg-sea water, leaving a clear space behind them. While this explanation of the ring formation might be true — ^if su...pported by a direct chemo- tropic method like Pf effer 's — it can be shown that the ring formation is in all probability due to an entirely different Digitized by VjOOQIC CHEMOTEOPISM 151 phenomenon which has no relation to chemotropism or any other tropism.
Buller had already observed that the supernatant sea water of sea urchins contains a substance which causes the agglutination of spermatozoa.®^ A drop of sea water in which eggs had been deposited was placed upon a slide and a drop containing spermatozoa near it.
What to read after Forced Movements Tropisms And Animal Conduct?
You can find similar books in the "Read Also" column, or choose other free books by Jacques Loeb to read onlineMoreLess
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