939 resultados para Aves cinegéticas
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"Aangehaalde boekwerken": p. [116]-121.
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Mode of access: Internet.
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Mode of access: Internet.
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En port.: Parte cuarta.
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Mode of access: Internet.
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This activity book is designed to supplement the information provided in the Illinois Common Birds poster from the Illinois Department of Natural Resources (IDNR). When using this book, students will become familiar with the traits and appearance of 18 bird species commonly seen in Illinois. The information and activities can help you to meet the following Illinois Learning Standards: 12.B.2a; 12.B.2b.
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Mode of access: Internet.
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"Autores": 7th-10th prelim. leaves.
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Includes index.
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Includes indexes.
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Mode of access: Internet.
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Med's case.--Arguments of counsel; Benjamin R. Curtis. esq., for the respondent, Ellis Gray Loring, esq., for the petitioner, Hon. Rufus Choate, for the petitioner, Charles P. Curtis, esq., for the respondent.--Opinion of the court.
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Mode of access: Internet.
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Greek text.
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The spermatozoon of Apus apus is typical of non-passerines in many respects. Features shared with palaeognaths and the Galloanserae are the conical acrosome, shorter than the nucleus; the presence of a proximal as well as distal centriole; the elongate midpiece with mitochondria grouped around an elongate distal centriole; and the presence of a fibrous or amorphous sheath around the principal piece of the axoneme. The perforatorium and endonuclear canal are lost in A. apus as in some other non-passerines. All non-passerines differ from palaeognaths in that the latter have a transversely ribbed fibrous sheath whereas in non-passerines it is amorphous, as in Apus, or absent. The absence of an annulus is an apomorphic but homoplastic feature of swift, psittaciform, gruiform and passerine spermatozoa. The long distal centriole, penetrating the entire midpiece, is a remarkably plesiomorphic feature of the swift spermatozoa, known elsewhere only in palaeognaths. The long centriole of Apus, if not a reversal, would be inconsistent with the former placement of the Apodiformes above the Psittaciformes from DNA-DNA hybridization. In contrast to passerines, in A. apus the microtubules in the spermatid are restricted to a transient single row encircling the cell. The form of the spermatozoon fully justifies the exclusion of swifts from the passerine family Hirundinidae.