Prehistoric forms of life are found in fossils. The probability of finding fossils of more comples organisms-

Options

A. increases from lower to upper strata
B. decreases from lower to upper strata
C. remains constant in each stratum
D. uncertain

Answer

A

Explanation

During the course of evolution simple organisms evolved first while complex organisms evolved later. Fossilization of complex organisms took later in upper strata of earth crust.