Which mineral is a component of stomach acid?
a. potassium
b. sodium
c. chloride
d. phosphorus?

What metric units would you use to measure the thickness of a key

Which substance is a steroid? cholesterol fatty acid monosaccharide trans fat

Polar bears give birth and hunt on sea ice. which of the following would polar bears survive during the melting of arctic ice? growing another layer of fur during summer migrate inland to search for different food sources staying put until the ice refreezes sticking to the usual diet of seals