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which group tells the three unifying characteristics of chordates?

notochord, gill slits, dorsal nerve cord

dorsal nerve cord, radial symmetry, three layers of cells

water vascular system, backbone, gill slits

exoskeleton, notochord, lungs

Notochord, gill slits, dorsal nerve cord

Explanation: just is

b. acid is the correct answer @jayxboof all social media

acid : acids are those which accepts an electron-pairs.

base : bases are those which donates ab electron-pairs.

alkali : it is a base that dissolves in water. it is basically a base and the ph greater than 7.

hydroxide ion : it is a poly-atomic ion which is negatively charged.