Why do cellphone service providing firms often charge higher price to pre paid clients than those on contracts ​

Explain why in any given geographical region, women tend to have lighter skins( by 3-4% on average) than men?

What are the two main phases of a cell cycle

The fruit of a certain plant is sweet and fleshy. the seeds of this plant have a seed coat that is fairly tough. the seeds germinate better if they are exposed to acid, or scarification. what is the most likely type of dispersal for this seed? water animal wind