Question

to support the digestive tract. pharyngeal slits can be found in the pharynx of humans and fish. what is a notochord? the beginning of the skin that eventually surrounds the organism in scales an organ that develops into fins and a tail a flexible, longitudinal rod between the digestive tract and the nerve cord

Explanation:

• The first option describes a structure related to scale - forming skin, not a notochord.
• The second option describes an organ related to fin and tail development, not a notochord.
• A notochord is defined as a flexible, longitudinal rod - like structure that lies between the digestive tract and the nerve cord in chordates during their development (or in some cases persists in adult forms).

Answer:

C. a flexible, longitudinal rod between the digestive tract and the nerve cord (assuming the options are labeled A, B, C with C being the third option as per the description)