Oil and natural gas formed over hundreds of millions of years from the carbon-rich remains of which organisms?

Question

Quizplus · Accepted Answer

Oil and natural gas formed from the carbon-rich remains of plankton, which accumulated at the bottom of ancient oceans and lakes over hundreds of millions of years. The remains were buried under sediment and subjected to heat and pressure, which transformed them into fossil fuels.

Oil and Natural Gas Formed Over Hundreds of Millions of Years