Dams can be useful because they provide water for irrigation and

Desalination is expensive and leaves behind large quantities of

please answer these two asap

How many trophic levels are there in the following food chain? phytoplankton - shrimp - perch - pike - osprey

What substance is the most acidic. lemon juice. tomato juice. sodium hydroxide. water

After frida stops exercising, she continues to breathe heavily. what is most likely occurring in her body? heavy breathing during exercise has produced an oxygen surplus in her muscles. this oxygen is being transported to her lungs. this is a result of aerobic respiration. heavy breathing during exercise has produced a carbon dioxide surplus in her muscles. lactate is being transported to her liver. this is a result of aerobic respiration. strenuous exercise has caused her body to be in carbon dioxide debt, and she is breathing hard while lactate is transported to the liver. this is a result of anaerobic respiration. strenuous exercise has caused her body to be in oxygen debt, and she is breathing hard while lactate is transported to the liver. this is a result of anaerobic respiration.