A Level Biology Practice Exam

What are fossils?

1. Remains of living species in modern times

2. Artifacts created by human activity

3. Impressions or remains of prehistoric organisms

4. Minerals found in sedimentary rock

The correct answer is: Impressions or remains of prehistoric organisms

Fossils are indeed best defined as impressions or remains of prehistoric organisms. They are the preserved evidence of life that existed in ancient times, which can include bones, shells, imprints of leaves, and even traces such as footprints. Fossils provide invaluable information about the history of life on Earth, allowing scientists to study the evolution of species, past climates, and ecological systems. The other options do not accurately describe fossils. Remains of living species in modern times refer to contemporary organisms, which do not qualify as fossils since fossils specifically relate to ancient life. Artifacts created by human activity pertain to archaeological finds rather than biological specimens and thus are not classified as fossils. Finally, while minerals can be found in sedimentary rock, they do not represent organisms or their remnants; rather, they may contribute to the formation of rocks in which fossils are often embedded.