Biological theories of aging involve changes on molecular, cellular, a

Biological theories of aging involve changes on molecular, cellular, and systemic levels. Influences on biological changes include

1. The environment, nutrition, and stress
2. Caregiver role strain
3. The number of crises a person has had in his or her lifetime
4. The ability to make choices

ESSAYBID ANSWER

ANS: 1
Ingestion or contact with many substances can cause unhealthy biological changes leading to poor health.