Most of the hydrocarbons within oil and natural gas are derived from the breakdown of organic matter from once-living ________.
A) dinosaurs
B) plankton
C) terrestrial plants
D) mammals

Question

Quizplus · Accepted Answer

Most of the hydrocarbons in oil and natural gas come from plankton that lived millions of years ago and have since undergone heating and transformation processes. The other options (dinosaurs, terrestrial plants, and mammals) also contribute organic carbon to fossil fuels, but to a much lesser extent than plankton.

Most of the Hydrocarbons Within Oil and Natural Gas Are