Que produce el sector primario en la ue

During which era in earth's history were the first insects? mesozoic precambrian cenozoic paleozoic

Which statement best describes how chemical equations demonstrate conservation of mass?

What conclusion can be drawn about the location of the city of syracuse? it was built on the coastline due to easy access to the red sea. it was built on the coastline due to easy access to the mediterranean sea. it was built inland to protect it from invaders sailing in from the mediterranean sea. it was built inland to protect it from invaders sailing in from the red sea.