Which of the following did the pax mongolica enable? 1.the adoption of a civil service in korea 2.the revival of travel and trade on the silk road 3.the spread of hinduism to southeast asia 4.the explorations of zheng he

2

Explanation:

aug 15, 2012 - although van leeuwenhoek was not the inventor of the microscope, he advanced it more he loved to grind and focus a new lens in order to see the unseen world. most of leeuwenhoek's microscopes were silver. in a simple but significant experiment (1668), he demonstrated that worms found on