How does a trait become more common in a population over time

At school, there have been a lot of rumors going around about how certain sexually transmitted diseases are spread. which skill would be most valuable to you take the necessary steps to learn what you need to know to protect yourself? a. self-direction b. critical thinking c. problem solving d. effective communication       select the best answer from the choices provided.

How does emergency conception reduce the risk of pregnancy

Most people deal with their mental disorders head on.true or false?