Question

within phylum chordata, which of these is a feature described as \a supportive, flexible, longitudinal rod between the digestive tract and the nerve cord?\ a notochord pharyngeal slits

Explanation:

In Phylum Chordata, the notochord is defined as a supportive, flexible, longitudinal rod located between the digestive tract and the nerve cord. Pharyngeal slits are openings in the pharynx with different functions (like filter - feeding in some, or developing into other structures), not matching the described feature. So the correct answer is "a notochord".

Answer:

A. a notochord