Answer: Antibiotics: 1929. ...
Tissue culture: 1949. ...
Risks of smoking: 1950. ...
Antipsychotics: 1952. ...
DNA: 1953. ...
Immunology: 1958. ...
Oral rehydration therapy: 1960s–1970s.
Explanation:
Answer: A civil township is a widely used unit of local government in the United States that is subordinate to a county
Explanation:
Answer: It began when Ronald Regan invented it
Explanation:
Answer:C
Explanation:
Mountains can change in several ways over time. They can undergo erosion by rain and wind, as well as landslides due to flooding. Some mountains change via volcanic activity.