I think that this would be carbohydrates, I'm not completely sure though.
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The best and most correct answer among the choices provided by your question is the first choice or letter A.
The onion cell <span>would not have a well-defined nucleus but would have a thick cell wall and ribosomes.</span>
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The feature that is created by deposition of the loosely packed and mineral-rich soil is Loess.
Loess is a loosely packed soil deposition due to blown wind of sediment rocks. The geography of loess is in between soil and clay. It is finer in texture than soil but has the coarse structure than the clay. This loess contains certain clay portions in order to hold the soil particles properly.
It can be mostly seen in Great Plains of North America, northern china, and other places around the world.
The influx of nitrogen is not healthy for an aquatic ecosystem because it is not something that normally appears in that environment. It can damage the plants and animals that live in the ecosystem. It can also affect the water and soil were the plants and animals live.
