Hello dear native English speakers.
Query about the same meaning expressed by three sentences.

1. In all organisms, from the human beings to bacteria and viruses, the genes, or units of heredity, are composed of nucleic acid.
2. All organisms, from the human beings to bacteria and viruses, the genes, or units of heredity, are composed of nucleic acid.
3. All organisms, such as the human beings to bacteria and viruses, the genes, or units of heredity, are composed of nucleic acid.
Question:
Which is grammatically correct?
Do they all have the same meaning?

Question

Hello dear native English speakers.
Query about the same meaning expressed by three sentences.

1. In all organisms, from the human beings to bacteria and viruses, the genes, or units of heredity, are composed of nucleic acid.
2. All organisms, from the human beings to bacteria and viruses, the genes, or units of heredity, are composed of nucleic acid.
3. All organisms, such as the human beings to bacteria and viruses, the genes, or units of heredity, are composed of nucleic acid.
Question: 
Which is grammatically correct?
Do they all have the same meaning?

Answer

1 is correct. 2 and 3 are not.   The crucial thing that is missing in 2 and 3 is the preposition IN.

It might be easier to see this if you simplify the example.  If we take out 'extra' clauses etc.:

"All organisms the genes are composed of nucleic acid."

You can hopefully see that this doesn't make sense.

You can say "The tires on all cars are rubber."
But you can't say "The tires all cars are rubber."

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