They are called reactants
<span><span><span>Understanding the nature and appearance of our galaxy is no small feat, for we live within a disk of obscuring gas and dust.Astronomers do not think that a supermassive black hole at the center of a galaxy is unique to the Milky Way. Rather, it appears to be quite typical of the almost innumerable galaxies in the observable universe. The fact that black holes may be the rule rather than the exception makes it even more important that we continue to study them.</span> </span><span> <span> </span></span></span>
The Fluid Mosaic Model states that membranes are composed of a Phospholipid Bilayer with various protein molecules floating around within it. The 'Fluid' part represents how some parts of the membrane can move around freely, if they are not attached to other parts of the cell.
A food handler who is throwing out garbage in an outdoor dumpster must immediately wash his hands after he has thrown the garbage. And the food handler must was his hands properly. To<span> wash hands correctly, a food handler must first wet hands and arms and than apply soap. If the food handler wore hand gloves while throwing the garbage he must remove them afterwards.</span>
