Bacteria: They are in your intestines to break down food and produce vitamin k your body needs.
Protist: Plant-like protists produce almost one-half of the oxygen on the planet through photosynthesis.
Hope this helps in some way !
Answer:
i believe it is they create a chemical compound
Explanation:
I belive the answer is a sand bar!
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I’m assuming you mean if the sun dies out. If so, then most things on earth would die within a few days due to lack of photosynthesis and to freezing temperatures (which is what would cause humans to die).