The earliest generally accepted fossils of living organisms are

A) yeasts.
B) stromatolites.
C) zircons.
D) carbon isotopes.

Generally Accepted Fossils

Fossil specimens that are widely recognized and accepted by scientists as valid evidence of ancient life.

Stromatolites

Layered structures formed by the growth of microorganisms, often found in fossil form and important for understanding the Earth's early biosphere and atmospheric evolution.

Yeasts

A diverse group of unicellular fungi that are widely used in baking, brewing, and biotechnology for their ability to ferment sugars.