Results 21 to 30 of about 767,407 (301)

Autoamplification and Competition Drive Symmetry Breaking: Initiation of Centriole Duplication by the PLK4-STIL Network

open access: yesiScience, 2018
Summary: Centrioles, the cores of centrosomes and cilia, duplicate every cell cycle to ensure their faithful inheritance. How only a single procentriole is produced on each mother centriole remains enigmatic.
Marcin Leda   +2 more
doaj   +1 more source

Change and Aging Senescence as an adaptation [PDF]

open access: yes, 2011
Understanding why we age is a long-lived open problem in evolutionary biology. Aging is prejudicial to the individual and evolutionary forces should prevent it, but many species show signs of senescence as individuals age.
A Leroi   +44 more
core   +5 more sources

Synthesizing a novel genetic sequential logic circuit: a push‐on push‐off switch

open access: yesMolecular Systems Biology, 2010
Design and synthesis of basic functional circuits are the fundamental tasks of synthetic biologists. Before it is possible to engineer higher‐order genetic networks that can perform complex functions, a toolkit of basic devices must be developed.
Chunbo Lou   +16 more
doaj   +1 more source

Apparent competition drives community-wide parasitism rates and changes in host abundance across ecosystem boundaries [PDF]

open access: yes, 2016
Species have strong indirect effects on others, and predicting these effects is a central challenge in ecology. Prey species sharing an enemy (predator or parasitoid) can be linked by apparent competition, but it is unknown whether this process is strong
Didham, RK   +5 more
core   +3 more sources

The Field of Cell Competition Comes of Age: Semantics and Technological Synergy

open access: yesFrontiers in Cell and Developmental Biology, 2022
Stem cells experience many selective pressures which shape their cellular populations, potentially pushing them to skew towards dominance of a few break-through clones. An evolutionarily conserved answer to curb these aberrant selective pressures is cell
Kieran Maheden   +2 more
doaj   +1 more source

Principles of parametric estimation in modeling language competition [PDF]

open access: yes, 2013
It is generally difficult to define reasonable parameters and interpret their values in mathematical models of social phenomena. Rather than directly fitting abstract parameters against empirical data, we should define some concrete parameters to denote ...
Gong, T, Zhang, M
core   +1 more source

Biology, distribution and geographic variation of loliginid squids (Mollusca: Cephalopoda) off southwestern Atlantic

open access: yesZoologia (Curitiba), 2018
The biology and ecology of southwestern Atlantic loliginid squids have been intensively researched in the last few decades, mostly off the Brazilian southern coast.
Rodrigo Silvestre Martins   +1 more
doaj   +1 more source

Effect of inbreeding and heritability of sperm competition success in the bulb mite Rhizoglyphus robini [PDF]

open access: yes, 2005
Sperm competition is a potent evolutionary force shaping the reproductive biology of most animal species. Here, we estimated the heritability of sperm competition success in the promiscuous bulb mite Rhizoglyphus robini.
Keller, L., Konior, M., Radwan, J.
core   +1 more source

The coevolution of toxin and antitoxin genes drives the dynamics of bacterial addiction complexes and intragenomic conflict [PDF]

open access: yes, 2012
Bacterial genomes commonly contain ‘addiction’ gene complexes that code for both a toxin and a corresponding antitoxin. As long as both genes are expressed, cells carrying the complex can remain healthy.
Brown, Sam P.   +3 more
core   +1 more source

Kin selection in interactions between gametes: Gamete competition, gamete limitation, and sex allocation

open access: yesFrontiers in Ecology and Evolution, 2023
Kin selection on one hand, and gamete interactions in post-ejaculatory sexual selection on the other are two major research themes that have risen to prominence over the past half century and have simultaneously developed into central fields of research ...
Lauri Myllymaa, Jussi Lehtonen
doaj   +1 more source

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