1. what was unusually abundant in the earth's atmosphere during the
carboniferous period?
what effect did that have on insects?
what was responsible for this abundance?

Which of the following types of tourist are best to bring money to the local southeast asian communities

Which of the following best describes the circumstance under which countries block the importation of certain products into their country? a. importation blockade b.trade barrier c.trade inhibitor d. domestic protection act

Islam and the arabic language spread throughout north africa in the 600s primarily through a. african traders b. american colonists c. european explorers d. middle eastern armies select the best answer from the choices provided