Yes. Oxygen crash led to Cambrian mass extinction
<span>Stem cells. There are two types of stem cells: adult stem cells - these are unspecialised cells that can develop into many (but not all) types of cells. Embryonic stem cells - these are unspecialised cells that can develop into any type of cell. And that's all! ;)
Hope this is useful !!!^_~!!!</span>
B would be the closest thing to wht you are looking for.
the observable universe is estimated to contain 200 billion to two trillion galaxies.
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It is referred to as a selective semipermeable membrane because it only allows certain things through, due to the size and shape of whatever is trying to get through.
Explanation:
the new method bring to light
