Answer: Microorganism activity affects soil acidity and the amount of organic matter in soil. It also affects the nutrient and mineral levels in soil as well as soil structure.
Explanation:
Answer:
1,3,4
A dichotomous key uses questions or statements to help identify organisms, it also uses characteristics in it's questions ( that may be yes-no) and statements to help separate organisms from one another.
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Explanation:
Showing dominance over were ever they did that at
The myelin sheath (C) insulates the axons.
The myelin sheath is a fatty substance, hence why it is great for insulation. <span />