In-facepiece dust concentration is changed dozens of times in a matter of minutes due to changes of the size of the gaps between the mask and face. Source. A respirator is a device designed to protect the wearer from inhaling particulate matter, including airborne microrganisms, fumes, vapors, i.e. gases.
Why join Brainly? A community for students. Products of the neolithic culture Steel plows Boats with sails Domesticated dogs Wild figs. the answer would mostly likely be referring to things that actually were of use to the neolithic people and agriculture was the biggest thing making the answer steel plow. anonymous.
Genetic markers in modern populations indicate the Neolithic migrants who brought farming to Europe travelled from the Levant into Anatolia and then island hopped to Greece via Crete and then to Sicily and north into Southern Europe. The analysis confirmed the Neolithic migrants arose from the Levant.