True, our ecosystem is not independent. Everything depends on everything else to survive. :)
Answer:
Explanation:
Matter can change form through physical and chemical changes, but through any of these changes matter is conserved. The same amount of matter exists before and after the change—none is created or destroyed. This concept is called the Law of Conservation of Mass.
All of them!
Composite subatomic particles (such as protons or atomic nuclei) are bound states of two or more elementary particles. For example, a proton<span> is made of two up </span>quarks<span> and one down quark, while the atomic nucleus of </span>helium-4<span> is composed of two protons and two </span><span>neutrons</span>
The answer is (patients do not receive harmful or ineffective medivatikn
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