Results 61 to 70 of about 66,642 (275)

Patterns of molecular evolution in a parthenogenic terrestrial isopod (Trichoniscus pusillus) [PDF]

PeerJ
The “paradox of sex” refers to the question of why sexual reproduction is maintained in the wild, despite how costly it is compared to asexual reproduction. Because of these costs, one might expect nature to select for asexual reproduction, yet sex seems
Emily Yarbrough, Christopher Chandler
doaj   +2 more sources

Examining New Donors in the OECD's Development Assistance Committee

Journal of International Development, EarlyView.
ABSTRACT How do emerging donors integrate into the existing international aid architecture? While the existing literature focuses largely on emerging donors from the Global South, such as Brazil, China, India and Russia, there are many emerging donors from the Global North that have joined the OECD's Development Assistance Committee (DAC)—the premier ...
Nicolas Bau, Simone Dietrich, Katharina Fleiner, Alice Iannantuoni   +3 more
wiley   +1 more source

Stable demographic ratios of haploid gametophyte to diploid sporophyte abundance in macroalgal populations.

PLoS ONE
Macroalgal populations often consist of free-living haploid (gametophyte) and diploid (sporophyte) stages. Various ecological studies have been conducted to examine the demographic diversity of haploid-diploid populations with regard to the dominant ...
Kazuhiro Bessho
doaj   +1 more source

Metabolism and Development during Conidial Germination in Response to a Carbon-Nitrogen-Rich Synthetic or a Natural Source of Nutrition in Neurospora crassa

mBio, 2019
Fungal spores germinate and undergo vegetative growth, leading to either asexual or sexual reproductive dispersal. Previous research has indicated that among developmental regulatory genes, expression is conserved across nutritional environments, whereas
Zheng Wang, Cristina Miguel-Rojas, Francesc Lopez-Giraldez, Oded Yarden, Frances Trail, Jeffrey P. Townsend   +5 more
doaj   +1 more source

The dialectics of trauma and political conscientization: A psychosocial study of activism for supporting sexual and gender minoritized communities in Brazil

Journal of Traumatic Stress, EarlyView.
Abstract This qualitative study examined the dialectical association between psychosocial trauma and political conscientization in the lives of activists advocating for persons with marginalized sexual orientations and gender identities (2SLGBTQIA+) in São José dos Campos, Brazil.
Gab C. Siqueira, Luisa F. Velásquez Vallejo, Antonio Euzebios Filho   +2 more
wiley   +1 more source

Sexual and asexual oogenesis require the expression of unique and shared sets of genes in the insect Acyrthosiphon pisum

BMC Genomics, 2012
Background Although sexual reproduction is dominant within eukaryotes, asexual reproduction is widespread and has evolved independently as a derived trait in almost all major taxa. How asexuality evolved in sexual organisms is unclear.
Gallot Aurore, Shigenobu Shuji, Hashiyama Tomomi, Jaubert-Possamai Stéphanie, Tagu Denis   +4 more
doaj   +1 more source

Unusually Large Number of Mutations in Asexually Reproducing Clonal Planarian Dugesia japonica. [PDF]

PLoS ONE, 2015
We established a laboratory clonal strain of freshwater planarian (Dugesia japonica) that was derived from a single individual and that continued to undergo autotomous asexual reproduction for more than 20 years, and we performed large-scale genome ...
Osamu Nishimura, Kazutaka Hosoda, Eri Kawaguchi, Shigenobu Yazawa, Tetsutaro Hayashi, Takeshi Inoue, Yoshihiko Umesono, Kiyokazu Agata   +7 more
doaj   +1 more source

Simulations of a mortality plateau in the sexual Penna model for biological ageing [PDF]

, 2005
The Penna model is a strategy to simulate the genetic dynamics of age-structured populations, in which the individuals genomes are represented by bit-strings.
A. O. Sousa, J. S. Sá Martins, J. Vaupel, K. Luz-Burgoa, S. Moss de Oliveira, S. Moss de Oliveira, V. Schwämmle, Z.-F. Huang   +7 more
core   +1 more source

The effects of seasonality and parasitism on diet and habitat selection in the common periwinkle

Oikos, EarlyView.
The common periwinkle Littorina littorea is an ecologically important grazer, known for its strong influence on algal communities and its role in structuring ecosystems. It serves as the first intermediate host for several trematode species in the Baltic Sea, especially for the fluke Cryptocotyle lingua.
Friederike Gronwald, Claudia Bommarito, Dakeishla M. Díaz‐Morales, Alessandro Manfrin, Cindy Martinez Reyes, Milen Nachev, Bernd Sures, Florian Weinberger   +7 more
wiley   +1 more source

Scientific results of the Bryotrop expedition to Zaire and Rwanda : 7., life strategies of epiphytic bryophytes from tropical lowland and montane forests, ericaceous woodlands and the Dendrosenecio subpáramo of the eastern Congo basin and the adjacent mountains (Parc National de Kahuzi-Biega/Zaire, Forêt de Nyungwe/Rwanda) [PDF]

, 1995
Life strategies of epiphytic bryophytes are studied along an altitudinal gradient from the eastern Congo basin (tropical lowland zone) to the mountains of the East-African graben (tropical subalpine/alpine Zone; BRYOTROP III-transect).
Frey, Wolfgang, Kürschner, Harald, Seifert, Ulrike H.   +2 more
core