What causes genetic variation in a population?
1. environmental changes
2. random mutations
3. favorable adaptations

What are ways that tobacco use can affect familyand socity

Alot of ! why does society places such an emphasis on the value of physical health and wellness? what are the benefits of active living?

Write a short letter to an imaginary friend. tell him or her how you feel about substance abuse. suggest at least 2 (two) alternatives that will you friend relieve the tension or anxiety he or she feels. give an example of one way the friend can get if they need to get .