assuming equal concentrations of conjugate base and acid, which of the following mixtures is suitable for making a buffer solution with an optimum ph of 9.2 – 9.3?

Which of these international trade concepts results in specialization and trade increases in total world output? a) absolute advantage b) balance of payments c) absolute advantage d) international tariffs

The graph shows the populations of two species over time. which type of symbiotic relationship does the graph represent? a. commensal b. mutualistic c. parasitic d. parent-offspring e. predator-prey

Tissues that carry food water and nutrients throughout the plant