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secretion

(Encyclopedia)secretion, in biology, substance elaborated by the living material of an animal or plant. Secretions in humans can be produced by a single cell or by a group of cells commonly called a gland. Some sec...

Driesch, Hans Adolf Eduard

(Encyclopedia)Driesch, Hans Adolf Eduard häns äˈdôlf āˈdo͞oärt drēsh [key], 1867–1941, German philosopher, b. Bad Kreuznach, grad. (zoology) Univ. of Jena, 1889. His early interest in biology was gradual...

Dubochet, Jacques

(Encyclopedia)Dubochet, Jacques, 1942–, Swiss biophysicist and molecular biologist, Ph.D., Univ. of Geneva 1973. Dubochet was a researcher at the European Molecular Biology Laboratory in Heidelberg from 1978 to 1...

endoderm

(Encyclopedia)endoderm ĕnˈdədûrmˌ [key], in biology, inner layer of tissue formed in the gastrula stage of the developing embryo. At the end of the blastula stage, cells of the embryo are arranged in the form ...

homology

(Encyclopedia)CE5 Homology in bones of a bird wing and an amphibian foreleg homology hōmŏlˈəjē [key], in biology, the correspondence between structures of different species that is attributable to their ev...

Gesner, Konrad von

(Encyclopedia)Gesner, Konrad von kônˈrät fən gĕsˈnər [key], 1516–65, Swiss scientist and bibliographer. Gesner was noted for his scholarship and erudition in almost every field of knowledge. He lived in Z�...

Geddes, Sir Patrick

(Encyclopedia)Geddes, Sir Patrick gĕdˈĭs [key], 1854–1932, Scottish biologist and sociologist, distinguished especially in town planning. He received his biological training in T. H. Huxley's laboratory; from ...

Friedrich Schiller University of Jena

(Encyclopedia)Friedrich Schiller University of Jena frēˈdrĭkh shĭlˈər, yāˈnə [key], at Jena, Germany; founded 1548 as an academy; became the Univ. of Jena 10 years later. The school gained an international...

Nüsslein-Volhard, Christiane

(Encyclopedia)Nüsslein-Volhard, Christiane,1942–, German biologist and geneticist, Ph.D. Univ. of Tübingen, 1973. Since 1985 she has been director of the genetics division of the Max Planck Institute for Develo...

notochord

(Encyclopedia)notochord nōˈtəkôrdˌ [key], in biology, supporting rod running most of the length of animals of the phylum Chordata and present at varying times in the life cycle. Composed of large cells packed ...