After 10 years, the isotope would have had two half lives. For each half life, half of the material reacts. Therefore, after one half life, 50% remains. Then, after a second, 25% remains. D is the correct answer.
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B. Ocetoclast is the answer.
<span>The extracellular fluid would have more salt. This would be because more of the sodium would be found in the blood than in the cells. Keeping a static level of sodium in the bloodstream is necessary for the proper cell activities, but increasing sodium intake can lead to negative effects.</span>
Differentiation occurs numerous times during the development of a multicellular organism as it changes from a simple zygote to a complex system of tissues and cell types.
