In what part of the world is the mutation for lactose tolerance most concentrated?

Why do oceanic plates tend to subduction when colliding with a continental plate

Many organizations release indexes used to measure the development of the world's countries. as we learned in this lesson, these indexes measure many factors, from life expectancy to happiness. in your opinion, what are the three most important factors we can use to determine how developed a country might be? explain your answers in a few sentences.

Explain how light energy is turned into chemical energy? ! due tomorrow!