The New Encyclopędia Britannica, Volume 16Encyclopędia Britannica, Incorporated, 1981 - Encyclopedias and dictionaries |
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Page 318
10–30 mm long ; 120 species . Subclass Cirripedia ( barnacles ) Upper Silurian ( 420,000,000 to 395,000,000 years ago ) to present , worldwide , marine to brackish water . Sedentary or parasitic ; head usually reduced and abdomen lost .
10–30 mm long ; 120 species . Subclass Cirripedia ( barnacles ) Upper Silurian ( 420,000,000 to 395,000,000 years ago ) to present , worldwide , marine to brackish water . Sedentary or parasitic ; head usually reduced and abdomen lost .
Page 914
of different species . In both plants and animals , these changes involve the relinquishing of their opportunistic characteristics . Effects of the new environment . On the other hand , an organism arriving in a new area may have little ...
of different species . In both plants and animals , these changes involve the relinquishing of their opportunistic characteristics . Effects of the new environment . On the other hand , an organism arriving in a new area may have little ...
Page 939
Species of wheat differ in the degree of ploidy — i.e . , in the number of chromosome sets in their cell nuclei . The einkorn wheat , for example , which seems to have been involved in cultivation earlier than all other wheats , has 14 ...
Species of wheat differ in the degree of ploidy — i.e . , in the number of chromosome sets in their cell nuclei . The einkorn wheat , for example , which seems to have been involved in cultivation earlier than all other wheats , has 14 ...
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Bibliographic information
| Title | The New Encyclopędia Britannica, Volume 16 The New Encyclopędia Britannica |
| Edition | 15 |
| Publisher | Encyclopędia Britannica, Incorporated, 1981 |
| Original from | University of Minnesota |
| Digitized | 19 Jan 2010 |
| ISBN | 085229378X, 9780852293782 |
| Export Citation | BiBTeX EndNote RefMan |