Answer:
The characteristic features of the phylum Chordata are a notochord, a dorsal hollow nerve cord, pharyngeal slits, and a tailgut.
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<span>The correct answer for the first question is the third statement. Researchers developing prosthetic devices have recently discovered a way to fuse patients' nerves to robotic limbs. In number two, the correct answer is the second person in the choices. Hosni Mubarak resigned the presidency of Egypt as a result of "Arab Spring" demonstrations. </span>
