What is one structure humans have that came from our ancestors?

answer: the time zones used to be whatever the local authority wanted them to be. one town might have 6am whenever the sun came up and another town had 6am 10 minutes later.  

the trains had a hard time when their orders said to be at a certain point at 6am.  

6am, but who's 6am.  

the railroads got together and set the time zones more or less along the longitude lines across the country.

explanation:

it would be a. that is the only one i could think of

early greek culture has had an important impact on government and education. first of all, they established the democratic political systems and procedures we have today. consequently, we inherited trial by jury for example. considering education, greek philosphers, mathematicians set he intellectual basis of different areas of studies. in addition, the alphabet originated from the phoenician alphabet into the one we have today and the first library was built in egypt. moreover, greek culture has an impact in current art, architecture and sports disciplines.

how did the pendleton civil service act weaken the spoils system after president garfield died?

the act forced federal employees to pass competitive exams.

the act said that federal employees could be fired for political reasons.

the act said that company contracts and kickbacks were illegal.

the act stopped the reform movement in its tracks.