Respuesta :

Answer:placoderm fish

Explanation:I was taking a test and that was the answer

luisvaschetto

The life-form that existed on Earth for the shortest period of time was placoderm fish.

What were placoderm fish?

The placoderm fish were a type of armored fish, which lived in the prehistoric period and are now extinct.

  • These placoderm fish lived during the Silurian period until the Devonian period.

  • Conversely, the dinosaurs are reptile fossils that lived during the Mesozoic Era.

In conclusion, the life-form that existed on Earth for the shortest period of time was placoderm fish.

Learn more in:

https://brainly.com/question/1426050

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