Results 101 to 110 of about 5,277 (217)
Evolutionary analysis of the genomic region of FOXP3 in vertebrates [PDF]
, 2015 The Human FOXP3 gene plays a role in immunosuppression, which includes the suppression of the maternal immune system to allow the growth of a semi-foreign fetus inside her uterus.
Guffey, Ethan G.
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Fetal adaptations for viviparity in amphibians [PDF]
Journal of Morphology, 2014 ABSTRACTLive‐bearing has evolved in all three orders of amphibians—frogs, salamanders, and caecilians. Developing young may be either yolk dependent, or maternal nutrients may be supplied after yolk is resorbed, depending on the species. Among frogs, embryos in two distantly related lineages develop in the skin of the maternal parents' backs; they are ...
openaire +2 more sources
Mitochondrial DNA. Part B. Resources, 2019 The viviparous Multiocellated Racerunner, Eremias multiocellata, is widespread in North China, Mongolia, and the Tuva Republic of Russia. A nearly complete mitochondrial genome of one individual from the suburb of Jingyuan County in Northwest China was ...
Xiuliang Su +3 more
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Revista de Biología Tropical, 1998 Fall reproduction is a common pattern in viviparous lizards from Mexican mountains. The reproductive pattern of Sceloporus palaciosi is seasonal but asynchronous between sexes.
Fausto R. Méndez, Maricela Villagrán
doaj
Changes in body composition and fatty acid profile during embryogenesis of quillback rockfish (Sebastes maliger) [PDF]
, 2009 We investigated developmental changes in the body compositions and fatty acid (FA) profiles of embryos and preparturition larvae of the quillback rockfish (Sebastes maliger).
Rodgveller, Cara A., Sewall, Fletcher F.
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Pathological Parthenogenesis in Viviparous Toothcarps [PDF]
Nature, 1958 IN viviparous toothcarps parthenogenesis has been described in Lebistes reticulatus 1,2 and Xiphophorus helleri 2, while in this species also some cases of development of ovarial teratomas, caused by pathological parthenogenesis, are known3. In addition to these cases we observed a new one, namely in Heterandria formosa.
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Revista Mexicana de Biodiversidad, 2012 Egg retention (ER) and intrauterine embryonic development (IED) have been considered intermediate steps in the evolution from oviparity to viviparity. Sceloporus aeneus is an oviparous lizard that is closely related to the viviparous species (Sceloporus ...
Rodolfo García-Collazo +4 more
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Observations on the egg-cases of some ovo-viviparous and viviparous elasmobranchs, with a note on the formation of the elasmobranch egg-case [PDF]
, 1951 Egg-cases of a number of oviparous Elasmobranchs have been described from time to time, the oblong egg-capsules of skates and rays being known as `skate barrows,' 'sailors' purses,' 'mermaids' purses,' and 'mermaids' pin-boxes'.
Raghu Prasad, R
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How conflict shapes evolution in poeciliid fishes
Nature Communications, 2019 The viviparity driven conflict hypothesis predicts the evolution of the placenta will suppress the evolution of traits associated with pre-copulatory mate choice and accelerate speciation rate. Furness et al.
Andrew I. Furness +4 more
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eLifeEvolutionary transitions from egg laying (oviparity) to live birth (viviparity) are common across various taxa. Many species also exhibit genetic variation in egg-laying mode or display an intermediate mode with laid eggs containing embryos at various ...
Laure Mignerot +6 more
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