Results 81 to 90 of about 1,104,726 (307)
تاکسونومی و بیوسیستماتیک, 2013 In this research, the variation of spermatozoa traits among three male rainbow trout (Oncorhynchus mykiss) was used to examine how the relative influences of sperm density and duration of sperm motility account for sperm competition success.
Hossein Moradyan +3 more
doaj
COMP-1 promotes competitive advantage of nematode sperm
eLife, 2015 Competition among sperm to fertilize oocytes is a ubiquitous feature of sexual reproduction as well as a profoundly important aspect of sexual selection.
Jody M Hansen +2 more
doaj +1 more source
Early evolutionary history of the seed
Biological Reviews, EarlyView.ABSTRACT The seed is an essential stage in the life history of gymnospermous and angiospermous plants, facilitating both their survival and dispersal. We reappraise knowledge of the evolutionary history of the gymnospermous seed, from its origin in the late Devonian through to the well‐known end‐Permian extinctions – an interval encompassing the ...
Richard M. Bateman +2 more
wiley +1 more source
Sexual selection and the evolution of brain size in primates.
PLoS ONE, 2006 Reproductive competition among males has long been considered a powerful force in the evolution of primates. The evolution of brain size and complexity in the Order Primates has been widely regarded as the hallmark of primate evolutionary history ...
Michael A Schillaci
doaj +1 more source
Sperm Morphology in Neotropical Primates
Animals, 2019 The morphological and morphometric characterization of spermatozoa has been used as a taxonomic and phylogenetic tool for different species of mammals. We evaluated and compared the sperm morphometry of five neotropical primate species: Alouatta caraya ...
Eliana R. Steinberg +5 more
doaj +1 more source
Fascia, Eh. What Is It? What Is It Good for?
Clinical Anatomy, EarlyView.ABSTRACT Opinions on the meaning of the term fascia appear to have been diverging for the past quarter century. In 1998, the definition of fascia in the international standard anatomical nomenclature was narrowed by removing the term fascia superficialis.
Paul E. Neumann +10 more
wiley +1 more source
Cytoskeleton, EarlyView.ABSTRACT Of the three types of cytoskeleton known in animals—actin, microtubules, and intermediate filaments—only actin and microtubules exist in plants. Both play important roles in cellular shaping, organelle movement, organization of the endomembrane system, and cell signaling.
Norman R. Groves +3 more
wiley +1 more source
La compétition spermatique chez les insectes: les stratégies d'assurance de la paternité et la préséance du sperme [PDF]
Biotechnologie, Agronomie, Société et Environnement, 1999 Sperm competition in insects: paternity assurance and sperm precedence. The prediction that insects, as a result of polyandry, extreme sperm longevity within the female and high efficiency of sperm utilisation at fertilisation, are preadapted to sustain ...
Arnaud L.
doaj
Cytoskeleton, EarlyView.ABSTRACT Cooperativity between cytoskeletal proteins is crucial for spatiotemporal coordination in biological processes, like oogenesis. In mammalian and Drosophila oogenesis, proper assembly and function of actin networks require coordination between actin assembly factors Spire and formins, as well as actin‐associated proteins like myosins and Rab ...
Joseph Y. Ong +7 more
wiley +1 more source
Proceedings of the National Academy of Sciences of the United States of America, 2019 Significance Ejaculate quality plays an essential role in fertility, sperm competition, and offspring health. A key modulator of ejaculate quality is the social environment. Although males across taxa are known to strategically allocate sperm in response
Ben R. Hopkins +10 more
semanticscholar +1 more source