Ammonites fossil shell remains of

Ammonites are fossil shell remains of

Fossils

Fossils

Fossils are the remains of

A fossil is a

A fossil is a

Assertion (A): Fossils are remains of dead organisms. Reason (R): It is helpful in study of evolution .

Assertion :-Fossils are always remains of hard parts of life-forms found only in rocks. Reason :-Rocks are formed due to sediments.