For both plasticity and robustness, there are epigenetic and genetic sources of perturbations to a biological system, which act in different time scales.
A pathway may be considered to be a directional network of molecular interactions between components of a biological system that act together to regulate a cellular event or process.
The two singers spent the night curling their lips and dropping their consonants, and while only one of them could lay a biological claim to this act, no one in the crowd seemed to mind.
Strands of Neanderthal DNA found in modern humans can act like a biological clock, because they are fragmented more and more with each generation since interbreeding happened.
Parenthood is not a chosen act, but a biological command, a hugely consoling thought during the inevitable moments, as one wearily tidies Lego, when one is tempted to question the peculiar course that one's life has taken.
The eugenics movement provided a biological rationale for the Immigration Act of 1924, which discriminated against immigrants from eastern and southern Europe, and for laws in a number of states that restricted interracial marriage.
Earthworms act as a biological indictor of soil health, essential for healthy soil, and also playing the role of ecological engineer.
The stability of the disease-free equilibrium (mathbf{e_{2}}) implies that under certain conditions, total extinction is not possible and the introduction of infected prey into the system may act as a biological control to save the ecosystem from extinction.
In the 10th essay in Science's series in honor of the Year of Darwin, Erik Stokstad explores the question of the relative importance of the various forces that act on a biological community.
Therefore, the main objective of this present study was to develop a microbial consortium that can act as a biological tool for removal of organic solid wastes from the environment and application of the compost generated from the degradation to increase the fertility of the soil.
