Mesoamerican and south american civilizations emerged in the highlands of mexico and peru. these weathered mountain regions would be considered a landform.
a. primary
b. secondary
c. tertiary

Which best explains how this maneuver unblock a person's airway?

Nh3 +02-no + h20 is unbalanced what is the balanced equation

The blue particles in this image are able to cross the cell membrane through simple diffusion. how will they be transported? outside the cell inside the cell o a. the substances will move directly across the membrane from outside the cell to inside the cell. b. the substances will move through channels in the membrane proteins from outside the cell to inside the cell. o c. the substances will move through channels in the membrane proteins from inside the cell to outside the cell. o d. the substances will move directly across the membrane from inside the cell to outside the cell.