<span>A. a second group of scientists finding significant differences in the DNA of the two different subspecies </span>
Answer:
D. glucose.
Explanation:
I don't have any info on it so, hope this helps.
<span>chordates are the animals which are in phylum chordata and have backbone
</span>The trait that is ancestral to all chordates is <span>a vertebral column that is backbone
so option D is correct
hope it helps</span>