Question

which of these do scientists use to most accurately classify newly discovered organisms?
a. similarity of natural habitats
b. sequences of dna bases
c. observable physical features
d. fossil record occurrences

Explanation:

To classify organisms accurately, DNA base sequences (genetic information) are the most reliable as they reflect evolutionary relationships precisely. Habitat similarity (A) can be misleading (different organisms in same habitat). Physical features (C) can be convergent (similar but not related). Fossil records (D) are incomplete and not applicable to all new organisms. So DNA sequences (B) are best.

Answer:

B. Sequences of DNA bases