Well. Plants took root about 500 MILLION years ago. So the answer is almost all of the plants.
American bison
Fossil fuel.
fossil fules
The primary dating isotope is carbon-14
Fossil fuels (coal, oil and natural gas) are formed from the remains of plants and animals. Three hundred million years' of pressure turned the organic matter into fuel.
Coal is a solid fossil fuel formed in ancient swamps from the remains of plants and animals under great heat and pressure over millions of years. A liquid fossil fuel formed in oceans from the remains of plants and animals under great heat and pressure of millions of years is called oil.
Fossil Fuels such as coal, oil, and natural gas.
Natural gases are located in a few different places. Natural gases are in plants, animals and microorganisms that lived millions of years ago.
By using carbon 14 dating, scientists can date plants and animals that lived as long as 35,000 years ago.
The animal that first evolved, I guess. But no one knows what that was (because it lived millions and billions of years ago) or if there was an animal that evolved before all other animals. It would have eaten plants though because plants are plants, not animals and they use photosynthesis to survive.
I think 75 years
Gregor Mendel