Centromere drive is potentially deleterious to the host by causing skewed sex ratios or male sterility, effects that may be balanced by observed rapid evolution in genes encoding centromere associated proteins [22].
A wound is healthy when growth and death of microbes in the wound is balanced by the host.
Insect host/parasitoid interactions are co-evolved systems in which host defenses are balanced by parasitoid mechanisms to disable or hide from host immune effectors.
If selection for functionality is balanced by counter-selection from the host immune system, this could trigger a periodic cycle in which strains with and without fha repeatedly out-compete each other.
Direct costs of infection have potentially been balanced by indirect benefits in deteriorating environmental conditions, therefore sustaining infected host relative fitness.
Beauty is balanced by provocation.
But defiance was balanced by realism.
Strange specimens are balanced by elegant ones.
But opportunities are balanced by dangers.
At least it's "balanced" by partisanship.
