Answer:
Arteries have a great deal more smooth muscle within their walls than veins, thus their greater wall thickness. This is because they have to carry pumped blood away from the heart to all the organs and tissues that need the oxygenated blood. The endothelial lining of each is similar.
Explanation:
Here is your answer
Rocks break down as they interact with air and weather - Weathering
Density differences and other factors cause metals to concentrate in igneous rocks - volcanic activity
Seawater heats up from contact with hot rock, metals dissolves in it, the water rises and contacts cooler water, causing metals ores to settle on the ocean floor - hydro thermal energy
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I believe that the answer is D. lichens growing on cooled lava. Hope it helps.
<span>Expanding red giant stars will swallow too-close planets. In the solar system, the sun will engulf Mercury and Venus, and may devour Earth, as well. So logically concluding, the answer must be that it would devour the planets whole, and there will be no rotation, (assuming this is a trick question)</span>
Nzymes are highly selective catalysts, meaning that each enzyme only speeds up a specific reaction. The molecules that an enzyme works with are called substrates. The substrates bind to a region on the enzyme called the active site. There are two theories explaining the enzyme-substrate interaction.
