Aresearcher presents two lights of varying brightness to a subject who is asked to respond same or different as he or she compares the intensities. the researcher is seeking the threshold.

Apopulation of black bears depends on salmon from a stream for food. if a drought causes the stream to run dry one year, how will this likely impact the black bear population?

In this experiment, the was intentionally manipulated. it is the independent variable. the dependent variables that were measured were the

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