Question

what similarities do you see in the dna bases?
compare all the organisms. what trend do you
see?
the proportions of dna bases vary greatly
among organisms.
the proportions of dna bases are similar in
closely related organisms, but different in
organisms that are not closely related.
the proportions of dna bases are similar
among all organisms.
done

Explanation:

Looking at the table, for each organism, the percentage of adenine (A) is close to that of thymine (T), and the percentage of guanine (G) is close to that of cytosine (C). This is in line with Chargaff's rules. In closely related organisms (e.g., different species that may have evolutionary connections), we can observe that the base - pair ratios are more similar compared to organisms that are not closely related. For example, the base - pair ratios of human and chicken (both vertebrates) show some similarities in their A - T and G - C pairings.

Answer:

The proportions of DNA bases are similar in closely related organisms, but different in organisms that are not closely related.