Aflask filled with water and organic molecules was left open to the air for an hour and then was tightly stoppered. after being allowed to sit for a week, the flask was reopened and checked for living organisms. only anaerobic bacteria were found living in it. which of the following can be assumed about the conditions within the flask during the week it sat tightly stoppered?

Which of the following statements most accurately describes convergent evolution? the process in which two similar species evolve separately from each other and share similar characteristics the process in which a single species evolves into two or more new species the process in which two entirely different species evolve in response to each other the process in which two different species evolve separately from each other but still share similar characteristics

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

The chemical form of energy that is useable by the cell to do work