منابع مشابه
Phylogenetic relationships of the pipid frogs Xenopus and Silurana: an integration of ribosomal DNA and morphology.
Relationships of the pipid frog genus Silurana (= Xenopus tropicalis group of some authors) are of particular interest to developmental and molecular biologists because of the purported ancestral (i.e., unduplicated) karyotype of S. tropicalis relative to the genus Xenopus. Although most previous studies have assumed that Silurana is the sister group of Xenopus, recent morphological work sugges...
متن کاملPhylogenetic Relationships of the Pipid Frogs Xenopus and SSuratta: An Integration of Ribosomal DNA and Morphology’
Relationships of the pipid frog genus Silurana ( = Xenopus tropicalis group of some authors) are of particular interest to developmental and molecular biologists because of the purported ancestral (i.e., unduplicated) karyotype of S. tropicaks relative to the genus Xenopus. Although most previous studies have assumed that SiZuruna is the sister group of Xenopus, recent morphological work sugges...
متن کاملThe pipid root.
The estimation of phylogenetic relationships is an essential component of understanding evolution. Accurate phylogenetic estimation is difficult, however, when internodes are short and old, when genealogical discordance is common due to large ancestral effective population sizes or ancestral population structure, and when homoplasy is prevalent. Inference of divergence times is also hampered by...
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We have created a iSCSI SAN architecture which permits maintenance of network components without any downtime, thus improving our ability to maintain the SAN beyond iSCSI's mediocre reputation. We currently use this system to provide web-‐based services for all of Answers.com. During development of this architecture we learned three important lessons: Packet loss/congestion is absolutely fatal...
متن کاملFictive lung ventilation in the isolated brainstem preparation of the aquatic frog, Xenopus laevis.
Aquatic pipid frogs, unlike other anurans, never show sole buccal ventilation cycle, and exhale air from the lung before aspirating air into the buccal cavity. To study the mechanism that pipid frogs lack the buccal cycle, respiratory motor activities were recorded from the isolated brainstem-spinal cord preparation of Xenopus laevis. Brainstem preparations of Xenopus exhibited the intermittent...
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ژورنال
عنوان ژورنال: Journal of Experimental Biology
سال: 2010
ISSN: 1477-9145,0022-0949
DOI: 10.1242/jeb.046656