In indeterminate alfalfa nodules, the establishment of the senescent zone IV, in which both symbionts undergo simultaneous degeneration, has been considered, until now, as the end point of the symbiotic interaction.However, we now describe an additional zone, zone V, proximal to the senescent zone IV and present in alfalfa nodules more than 6 weeks
Abstract When scaling psychological tests with methods of item response theory it is necessary to investigate to what extent the responses correspond to the model predictions.In addition to the statistical evaluation of item misfit, the question arises as to its practical significance.Although item removal is undesirable for several reasons, its pr
Sperm cells have undergone an extraordinarily divergent evolution among metazoan animals.Parker recognized that because female animals frequently mate with more than one male, sexual selection would continue after mating cnd be demure and impose strong selection on sperm cells to maximize fertilization success.Comparative analyses among species hav
IntroductionMosquitoes either biologically or mechanically transmit various vector-borne pathogens affecting pigs.Mosquito species display a cmpk bolus wide variety of host preference, as well as host attraction and behaviours.Mosquito species attraction rates to- and feeding rates on pigs or other potential hosts, as well as the seasonal abundance