Let's look at each of these in turn: 1  Whey protein concentrate-WPC contains low levels of fat and low levels of carbohydrates (lactose). 2  The percentage of protein in WPC depends on how concentrated it is. 3  Lower end concentrates tend to have 30% protein and higher end up to 90%.
The Lake Bottom. Conditions at the bottom of large ponds and lakes do not change much throughout the year but dramatic changes in abundance of particular amoebae have been noted (O'Dell, 1979).
Another structure they form that is constantly active in many amoebas is known as a contractile vacuole. Because of their constant intake of water via osmosis, water must actively be moved out of the cell with great frequency. Small, membrane-bound bubbles of pure water, collected from the cytoplasm, are brought to the contractile vacuole, which then contracts, pumping its contents back into the environment.