What is cell differentiation and why is it important

Describe the technology advancements that lead to explorers being able to sail great distances. [[ps: doesn't explain where. i am only speculating it's in europe.

What form of government is powers of states? first letter of the answer is r.

Why did the meiji reformers want to modernize japan a) to colonize weaker nations in south east asia b) to allow western nations to protect them and treat negotiation c) to compete with the economics and military of western nations d) to replace additional prices with weston culture