“All vertebrates are chordates but all chordates are not vertebrates”. Justify the statement.

All vertebrates are chordates but all chordates are not vertebrates. Justify this statement.

All vertebractes are chordates but all chordates are not vertebrate. Explain.

All Vertebrates are Chordates, but all Chordates are not Vertebrates' - Explain the statement.

"All vertebrates are chordates but all chordates are not vertebrates." Evaluate and substantiate the statement

All the chordates are not vertebrates. Why ?