Which of the following best describes the evolution of cell communication in org

Question

Which of the following best describes the evolution of cell communication in organisms?

Because single-celled organisms do not use cell communication to survive, it most likely evolved after multicellular organisms.

Cell communication does not occur in bacteria, suggesting it evolved after the emergence of multicellular organisms.

Cell communication evolved early in the history of life because cell-signaling mechanisms are present in plants, animals, and bacteria.

Signaling processes evolved independently across kingdoms because they all produce different cell communication hormones.

Explanation / Answer

Cell communications evoloved early in history of life because cell signalling mechanisms are present in plants,animals and bacteria

Since cell communications are present in both prokaryotes ( bacteria) and multicellular eukaryotes(plants and animals),cell signalling mechanisms must have evolved really early in history of life on earth.If they had evolved later,we would have seen cell signalling in only prokaryotes or eukaryotes, not in both.Even multicellular eukaryotes show cell signalling mechanisms,indicating that it evolved gradually over millions of years starting with unicellular prokaryotes,then tounicellular eukaryotes and finally in multicellular eukaryotes.

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