Why did most states limit the power of their governors and divide their legislatures into two bodies?

The transcontinental railroad runs from the to the i. north ii. south iii. east iv. west a. i and ii b. ii and iii. c. iii and iv d. ii and iv

"if i have seen farther than others," said newton, "it is because i have stood on the shoulders of giants." who were the giants to whom newton was referring? could this be said of any scientific accomplishment? explain.

(05.04 mc) how did the roman transportation system keep the empire strong? plz