File:Frog egg gray crescent.jpg
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![File:Frog egg gray crescent.jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/8/8c/Frog_egg_gray_crescent.jpg/779px-Frog_egg_gray_crescent.jpg?20240314220212)
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[edit]DescriptionFrog egg gray crescent.jpg | Cortical localisation of dorsal lip region in frog's egg shown by forced rotation of the egg. Thick line, original plane of symmetry ; chain line, new plane of symmetry, passing through centre of grey crescent region (stippled) and mass of yolk which has streamed down to lower pole by gravity. (From Weigmann, Zeitschr. f. Wiss. ZooL cxxix, 1927.) |
Date | |
Source | https://www.flickr.com/photos/internetarchivebookimages/21241301012 The elements of experimental embryology. New York [Hafner Pub. Co.] |
Author | Huxley, Julian, De Beer, Gavin, Sir. |
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[edit]Public domainPublic domainfalsefalse |
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This work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 70 years or fewer. ![]() Note that a few countries have copyright terms longer than 70 years: Mexico has 100 years, Jamaica has 95 years, Colombia has 80 years, and Guatemala and Samoa have 75 years. This image may not be in the public domain in these countries, which moreover do not implement the rule of the shorter term. Honduras has a general copyright term of 75 years, but it does implement the rule of the shorter term. Copyright may extend on works created by French who died for France in World War II (more information), Russians who served in the Eastern Front of World War II (known as the Great Patriotic War in Russia) and posthumously rehabilitated victims of Soviet repressions (more information).
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This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights. |
https://creativecommons.org/publicdomain/mark/1.0/PDMCreative Commons Public Domain Mark 1.0falsefalse
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This image was originally posted to Flickr by Internet Archive Book Images at https://flickr.com/photos/126377022@N07/21241301012. It was reviewed on 2024-03-14 22:05:33 by FlickreviewR 2, who found it to be licensed under the terms of the cc-zero, which is compatible with the Commons. It is, however, not the same license as given above, and it is unknown whether that license ever was valid. |
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current | 22:02, 14 March 2024 | ![]() | 1,060 × 816 (133 KB) | Rasbak (talk | contribs) | {{Information |description=Cortical localisation of dorsal lip region in frog's egg shown by forced rotation of the egg. Thick line, original plane of symmetry ; chain line, new plane of symmetry, passing through centre of grey crescent region (stippled) and mass of yolk which has streamed down to lower pole by gravity. (From Weigmann, Zeitschr. f. Wiss. ZooL cxxix, 1927.) |date=1963 |source=https://www.flickr.com/photos/internetarchivebookimages/21241301012 The elements of experimental embry... |
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