Osteosarcoma cases are rare. Why does this make it difficult to determine if fluoride causes this cancer?

Explain how organisms could be harmed by high levels of salt from roadways?

Which of the following forest management practices is best for reestablishing areas of forest?

Membrane vesicles containing an internal sodium chloride (nacl) concentration of 0.14 m are placed into separate beakers each containing a different solution. the first beaker contains 0.14 m sucrose, while the second beaker contains 0.14 m calcium chloride (cacl2). the temperature is 25°c. what is the solute potential inside the vesicles, expressed in units of mpa?