its nitrogen i took the testttttttttttttttttttttttttttttttttt
Answer: Prokaryotes, archaea, protists, fungi, algae.
Explanation:I don’t think there are any single celled organisms that are today classified as animals. So basically I just left the animal kingdom out. Both metazoans and sponges are for the most part multicellular.
Answer:
The correct anwser is D. Signals inside the spinal cord
Explanation:
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