Question

the genetic code is essentially the same for all organisms. from this, one can logically assume which?
the same codons in different organisms translate into different amino acids
each species has its own unique set of amino acids different from all other species
a gene from one organism can theoretically be expressed by another organism
proteins were the first genetic material

Explanation:

The genetic code being universal (same for all organisms) means a gene from one organism can be expressed by another because the codons (genetic code units) will translate to the same amino acids. The first option is wrong as universal code implies same codons - same amino acids. The second option is wrong as universal code means shared amino acid - codon mapping, not unique per species. The fourth option is about origin of genetic material, unrelated to universal code. So the correct assumption is that a gene from one organism can be expressed by another.

Answer:

A. A gene from one organism can theoretically be expressed by another organism