<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>
B. Halons............................
What are the functions of proteins within your body?
Answer:
Eastern grey squirrels provided food for Native Americans and colonists and are still eaten by some people today. They have economic importance in some states, such as Mississippi where 2.5 million are harvested each year with an economic impact of 12.5 million dollars.
Nucleotides
Each nucleotide consists of a 5-carbon sugar (deoxyribose<span>), a nitrogen containing base attached to the sugar, and a </span>phosphate<span>group.</span>
