Which claim identifies the primary role of decomposers in an ecosystem? * They control the population of producers and consumers.
They compete with producers for energy and other resources.
They provide a source of energy for the producers in the ecosystem.
They recycle energy and materials from dead producers and consumers.

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?