Three Mosquito Pools Test 'Positive' for WNV; Frisco to Spray Saturday, Sunday Nights. (August 12, 2016) The City of Frisco will spray for mosquitoes August 13 and 14 after receiving confirmation three additional mosquito pools tested âpositiveâ for West Nile virus (WNV). Read on...
Grasshoppers have large compound eyes and and have a board field of vision. Mouthparts-Mouthparts have evolved for special needs for different insects. They can chew, suck, pierce, lap, and sponge-up their food. Grasshopper has the most primitive type of mouthparts for chewing.
Nervous System of Platyhelminthes. Platyhelminthes occupy a position of strategic phylogenetic importance in that they are the most primitive members of Bilateria and constitute the basal stock from which all higher animal phyla are thought to have evolved.n addition to nerve cords, well-developed nerve nets or plexuses can be found in all flatworm taxa. These include subsurface, submuscular, pharyngeal and intestinal (=stomatogastric) and reproductive nerve plexuses. In some places, the plexuses are in continuity with both main and minor nerve cords.