What is the “arid zone” in australia and how are plants and animals adapted for survival there?

In 1933 the 21st amendment was added to the u. s. constitution, allowing for the manfacture, transportation, and sale of alacoholic beverages in the united states. why was this amendment needed?

Air masses are characterized by various properties including temperature humidity air temperature pressure and wind speed . which of the following air masses is associated with low relative humidity and high temperature

These factors threaten north americas ecosystems