The New Encyclopædia Britannica: L-ZEncyclopædia Britannica, 1992 - 32 pages |
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Page 250
... fossil history of the major algal groups . Some believe that the group is ancient , but there are no fossils . Others point out that there is a lack of data to support this view and suggest that the group evolved recently , as indicated ...
... fossil history of the major algal groups . Some believe that the group is ancient , but there are no fossils . Others point out that there is a lack of data to support this view and suggest that the group evolved recently , as indicated ...
Page 425
... fossil amphibians have the otic notch ; presumably , many also possessed an eardrum and middle - ear cavity . Others lack the otic notch . Annotated classification . The classification of the am- phibians has not yet been satisfactorily ...
... fossil amphibians have the otic notch ; presumably , many also possessed an eardrum and middle - ear cavity . Others lack the otic notch . Annotated classification . The classification of the am- phibians has not yet been satisfactorily ...
Page 633
... Fossil record . One of the interesting observations to come out of the study of fossils of the earliest flower- ing plants , which appeared during the Cretaceous Period ( from 65,000,000 to 136,000,000 years ago ) , is that most of them ...
... Fossil record . One of the interesting observations to come out of the study of fossils of the earliest flower- ing plants , which appeared during the Cretaceous Period ( from 65,000,000 to 136,000,000 years ago ) , is that most of them ...
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20th century Abelian group addition aesthetic Afghanistan agriculture Albania alcohol algae algebra animals basin called central centre ceremonial climate coast common complex numbers Congo contains Côte d'Ivoire countries crops cultivation culture dance defined desert developed drinking drug East eastern economic Egypt elements equations European example farm feet field Figure finite fish forest functor Igbo important Indians integers irrigation isomorphism Kabul Kenya Lake Lake Chad Lake Victoria land language lattice Lie algebra linear major mapping miles modern mountains Niger Nigeria Nile northern operations patterns percent period Plains plants Plateau polynomial population rainfall real numbers region ring ritual River Sahara savanna social soil South Africa southern Africa species subgroup Sudan Tanzania theory tion traditional tribes tropical United valley vector space vegetation village West Africa western x₁ Yoruba Zaire Zambia Zimbabwe