Answer:
Their genetic code
Explanation:
Every cell is made with a genetic code that tells them what their jobs are in the cell, it is from when they are first formed
Hot weather would be the answer
One of the primary consequences of the railroad in the United States was the creation of a system by which goods could easily be moved east to west, opening new sections up that were previously only accessible by horse or on foot.
Egyptians has to explore and make new decisions
