This is a fun puzzle. The pink molecule is a protein and the other molecule is a nucleic acid.
If I gave you the amino acid sequence of this protein, or the nucleotide sequence of this nucleic acid, what is the probability of finding a similar sequence in a different species (picked at random)?
D. It depends on the database that you're searching.
You can have more than one answer.
Now, here's the hard part. Explain why you think your answer is correct.