
Tuesday, November 25, 2008
Ice pop

Wednesday, November 12, 2008
Freshwater

Freshwater creates a hypotonic environment for aquatic organisms. This is problematic for little organisms, whose cell membranes will burst if excess water is not excreted. Some protests accomplish these using contractile vacuoles, even as freshwater fish excrete overload water via the kidney. Although most aquatic organisms have a limited ability to regulate their osmotic balance and therefore can only live within a narrow range of salinity, fish have the ability to migrate between freshwater and saline water bodies. During these migrations they undergo changes to adapt to the surroundings of the changed salinities; these processes are hormonally controlled. The eel uses the hormone prolactin, while in salmon the hormone cortical plays a key position during this practice
Thursday, November 6, 2008
Nutritional value of non-diet soft drinks

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