Sexual Reproduction and the Organization of the Nucleus in Certain Mildews - Couverture rigide

Harper, Robert Almer 1862-1946

Couverture rigide

ISBN 10 : 1372997520 ISBN 13 : 9781372997525

Editeur : Wentworth Press, 2016

A propos du livre

Présentation de l'éditeur

Hshing the fact that the ascocarp originates in a sexual apparatus. Objections which are still urged by the opponents of De Bary sviews are rather in the nature of complaints and denials than in the presentation of new facts. A most fertile source of confusion in the discussion of the relationships of fruit forms in the fungi has been the failure to make all comparisons from the standpoint of a strictly phylogenetic morphology. Whatever excuse there may be for introducing physiological conceptions into the formal classification of tissues in the higher plants, there can be no question that great confusion has arisen in the morphology of the fungi and algse from allowing considerations of functional equivalence or difference to mingle with and modify the conceptions of what should be a strictly phylogenetic morphologv. It may be a hopeless task it certainly is not at present a very important or stimulating one to attempt to determine with exactness lines of phylogenetic descent among such plastic forms as the algae and fungi; but no other or lesser aim than this should be allowed to masquerade under the guise of morphology. Physiological data as to the functions and mechanics of cells and organisms are of far greater biological significance than those of phylogenetic morphology, but this is no reason for mixing the two or allowing such attempts as we may make at the arrangement of plant forms in evolutionary series to be vitiated by the introduction of purely functional criteria into the determination of our morphological classifications. The question, for example, whether a given organ is functional in its more primitive or in some modified fashion can have no bearing upon the determination of its morphological nature or relationships. Comparisons must frequently be made and hypothetical morphological categories established on data which are incomplete and c
(Typographical errors above are due to OCR software and don't occur in the book.)

Présentation de l'éditeur

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Détails de l'édition

• Éditeur: Wentworth Press
• Date d'édition: 2016
• Langue: anglais
• ISBN 10: 1372997520
• ISBN 13: 9781372997525
• Reliure: Relié
• Nombre de pages: 134
• Coordonnées du fabricant: non disponible
• Personne responsable: non disponible