Answer is Middle Paleozoic era.
Paleozoic era was in 542 Ma - 245 Ma and it has 6 periods as Cambrian, Ordovician, Silurian, Devonian, Carboniferous and Permian.
360-280 Ma - forming of vascular plants with woody tissues, seeds and veins.
430 - 410 Ma - forming of jawed fishes and first amphibians.
420 Ma - forming of scorpions
360 Ma - forming of crustaceans.
That would be a hypothesis
Hope this helps you :)))
It puts the earth in the middle. If you break down the word geocentric it very literally means earth middle. Hope this helps!
Answer:
This relationship between EDV, contraction strength, and stroke volume is thus a built-in,, or intrinsic, property of heart muscle, is known as the Frank-Starling law of the heart.
Explanation: