Which type of plant would most likely be found in desert region

Yes what can i with

When the indian plate collided with eurasian plate because it was cool 

Because ours has not callosped, its working without the planets crashing into eachother, and the sun is the right distance away.

They contributed many things, but here are some examples:

1) democracy - democracy as a political system was first implemented in ancient athens
2) some advances in mathematics - such as the pythagoras' law
3) the script - the roman script was adopted from ancient greek.