D) Diffusion helps gas exchange to occur
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Answer:
As soon as you cut or scrape skin anywhere on your body, special blood cells called platelets spring into action. Platelets stick together like glue at the cut, forming a clot. This clot is like a protective bandage over your cut that keeps more blood and other fluids from flowing out.
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Answer:
Bonded to meteorites that hit the Earth
Explanation:
The<u> origin of water on Earth</u> is being linked to the existence of very old meteorites that have been found on Earth. The<em> "Carbonaceous chondrites," </em>which are meteorites, have a similar content to that of seawater. Its<u><em> isotope levels</em></u> for hydrogen and nitrogen are similar with <em>Earth's seawater</em>. They're believed to have come from the outer asteroid belt and later on delivered water to Earth after collision.
