[Effect of serotonin on nervous system function and behavior in the honeybee].

Serotonin in concentration of 0.0025% increased the excitability of chemoreceptors and the dancing rhythm rate in honey bees; higher concentrations diminished electrical activity in the second thoracic ganglion, lowered dancing rhythm rate and accelerated the alteration of food conditioning reflexes. Serotonin exerted no effect on the excitability thresholds of the peripheral nervous activity.

[Radiosensitivity of somatic cells and imaginal disks of male and female Drosohila].

Primary chromosome damages as well as the frequency of spontaneous and X-rays induced chromosome aberrations in Drosophila melanogaster males and females are studied. It is found using cytofluorimetric method that primary chromosome damages in ganglia cells of females and males are the same. In these cells as well as in cells of imaginal discs the frequency of induced chromosome aberrations, except gaps, is considerably higher for females.