Which of the following would most severely affect a human population? (1 point)

a high number of smokers in a community

a high degree of genetic similarity among people

a high degree of illegal drug use among young adults

a high rate of mental disorders

Which plains area lies in both the united states and canada? altiplano central canadian shield coastal plains great plains

How is the carbon cycle related to global warming ?

Sarah and john are having a discussion on genetic diversity. sarah believes that it happen over a long period of time. john it happens immediately. who is correct? a. sarah is correct because genetic diversity occurs over a long period of time. b. john is correct because genetic diversity occurs immediately. c. both are correct because genetic variation can occur or long period of time. d. neither are correct because genetic diversity occurs over any period of time