The New Encyclopædia Britannica, Volume 16Encyclopaedia Britannica, 1981 - Encyclopedias and dictionaries |
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Page 3
... cones bear female gametophytes , or megagametophytes , on the up- per side of the cone scales . The nucleus of each living cell in a sporophyte contains a double set of chromosomes- the bodies that transmit genetic characteristics from ...
... cones bear female gametophytes , or megagametophytes , on the up- per side of the cone scales . The nucleus of each living cell in a sporophyte contains a double set of chromosomes- the bodies that transmit genetic characteristics from ...
Page 7
... cones of Lebachia were cylindrical and were borne singly at the tips of twigs on the same tree . In the Permian Period ( from 225,000,000 to 280,000 , - 000 years ago ) occurred Ernestiodendron filiciforme , vegetatively similar to ...
... cones of Lebachia were cylindrical and were borne singly at the tips of twigs on the same tree . In the Permian Period ( from 225,000,000 to 280,000 , - 000 years ago ) occurred Ernestiodendron filiciforme , vegetatively similar to ...
Page 8
... cones had scales with pronounced stalks and broadened , triangular terminal expansions set almost at right angles to the stalk . The ovulate cone scales bore two to five small ovules near the juncture of the stalk and the expanded ...
... cones had scales with pronounced stalks and broadened , triangular terminal expansions set almost at right angles to the stalk . The ovulate cone scales bore two to five small ovules near the juncture of the stalk and the expanded ...
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19th century Africa American animals areas became bee-eaters cells centimetres central centre century Church collagen conifers connective tissue conodonts conservation conservatism constitution continental continental drift copper Coraciiformes coral cosmic rays countries court covenant Cretaceous Crete cricket crime criminal Cro-Magnon crocodiles Crusade cultural deposits disease early Earth economic effect energy England Europe federal forest fossil France French function genera geosynclines groups hoopoes hornbills illus important industrial Iráklion island King known land later Le Corbusier legislation major ment metres minerals modern natural North Nyssaceae occur ocean Ordovician organized original Parliament particles party percent period plants political pollution population problems protection reefs region result River rock Roman Saladin sediments social South Soviet species structure theory tion town trade traditional trees tropical trouvères Union United usually western