They all have different compositions of protons, neutrons, and electrons. This causes variety and makes atoms different so they can make up different substances
A species that is not native to an ecosystem but is introduced artificially. Usually cause harm to the native species in the area.
Answer:
picky and typical selection.
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Answer:
The correct answer is B, 60%
Explanation:
Humus, which ranges in color from brown to black, consists of about 60 percent carbon, 6 percent nitrogen, and smaller amounts of phosphorus and sulfur