Cell membrane, because that’s the structure that allows organelles to leave and enter
Positive family ties would lead to a greater sense of responsibility for one's self and one's family, so people with positive family ties are more motivated to engage in behaviors that lead to better health.
Please restate the question , it don’t seem right .
D) all of the above
All of these are barriers to physical activity
Answer: Crying. (At least I’m pretty sure)
