In a population of snails the individuals with the thickest shells survive and reproduce more than those with thinner shells. assuming shell thickness is a heritable trait, what should happen to the mean shell thickness in a population of snails over time?

The shells thicken throughout each generation because of evolution.

Explanation:

there are conflicting perceptions. what cannot be denied is that despite a long history of discrimination, they finally chose to bow out in grace and handed over power to the majority. it was a painful experience for them to part with their prerogatives and some chose to leave the country. however, they did decide to bite the bullet and go through the process with minimum obstructions.

presently, whites are still a force to reckon with. they are well educated, have technical and business expertise, they understand imperatives of good governance and are responsible for keeping south africa connected with developed countries. despite a bitter history, they are useful team members of the south african team.

well, there are a lot of places we get information about earth from. like science classes, websites, books, newspapers, etc.