In which structure would you find a nucleus

In general, characteristics that an organism survive and reproduce become more common over time. what mechanism of evolution causes this?

What is the problem in this article? what solution does the article propose?

(6.02 mc)what affect do marine protected areas have on environmental quality? they increase environmental quality by preventing resource overuse. they increase environmental quality by adding new species. they decrease environmental quality by removing all human activity. they decrease environmental quality by adding recycling facilities.