determine what organisms need in order to be classified in the phylum Chordata.Sharp teethRetractable clawsA backboneHair or furI'm not sure

To be classified in the phylum Chordata, an organism needs to have the following characteristics:

1. A notochord: This is a flexible rod-shaped structure that is found in the embryonic stage of all chordates. It plays a role in the development of the nervous system.

2. A dorsal nerve cord: This is a hollow cord located above the notochord. It develops into the brain and spinal cord.

3. Pharyngeal slits: These are openings that connect the inside of the throat to the outside of the "neck". They are used for filter-feeding and respiration.

4. Post-anal tail: This is a tail that extends beyond the anus. It contains skeletal elements and muscles.

5. Endostyle or thyroid gland: This is a gland that produces hormones and is involved in the regulation of metabolism.

The presence of sharp teeth, retractable claws, a backbone, or hair/fur are not necessary for an organism to be classified in the phylum Chordata. These are characteristics that may be found in certain groups within the phylum, but they are not defining characteristics of the phylum as a whole.