The world population is building toward 9 billion, our available land is shrinking, and our communities are growing more connected, leaving one increasingly important global issue hanging over our heads. Consider the list above. Our vision of the
future includes
for all.

answer: land bridge theory. land bridge theory held that shifting portions of dry land explained the finding of identical species on different continents. plate tectonic theory eventually eliminated the land bridge theory.

organ system-an organ system is a group of organs that work together to perform one or more functions. each does a particular job in the body, and is made up of certain tissues.

the three components of a nucleotide are the nitrogenous base, the phosphate group and the five-carbon sugar.

the answer is c. altitude. hope this ! #brainiac