Im back :D question is: A dam is built on the Columbia River in 1938 and then eight more dams were built between 1940-1950. What happens to the fish populations when dams are built?

Consider the last statement in the prompt: "people take such environmental factors into account in their choices when deciding where to live." do all people have a choice as to where they live? what factor plays a key role in this decision and may therefore play a large role in determining quality of life?

Of your good in bio kusing a series of preliminary observations; pstate a problem developed from these observations, formulate a hypothesis, design an experiment to test the hypothesis

Answer questions from exploring further