Answer:
Top one is Nucleus
Middle one is DNA
Bottom mRNA
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Scientific ideas change over time as new
evidence is discovered
Decomposers also break down the bodies of dead organisms resulting in nitrogen being returned to the soil as ammonia. In some conditions denitrifying bacteria in the soil break down nitrates and return nitrogen to the air.
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Explanation:
a.catalase
b.It plays important roles in host defense and oxidative biosynthetic reactions. In addition there is growing evidence that at low levels, H2O2 also functions as a signaling agent, particularly in higher organisms.
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