Which macromolecules contains calcium?

What are other significant breakthroughs brought about by Sir Isaac's work? When volcanoes erupt the ash and dust settle then compact on the ground they become? How deep is the ocean at Grand Cayman? What is a scientific word for an answer? What is the price of pigeon blood red ruby per carat? Why do we think most extinctions occur as background extinctions? Because they are so highly organized living things are often called? Uses of atlas? Why are lines of latitude and lines of longitude perpendicular? What is released after photosynthesis? What is the major excretory product in your body? What is FALSE regarding the membrane potential? What do the parts of the re-productive organs do? Snowblower is not blowing snow - I checked the shear pins - ok - what now? Compare contrast How wind and glaciers abrade rock? Why do Scientists think a Asteroid hit the world 65 million years killed the dinos? What is the word for the dropping of sediment? How many hectares in a square mile? When two objects of different mass are dropped from the same height doesn't it contract Newton's 2nd Law? Where is the dividing line on the periodic table between metals and non metals?