What is the missing word? Fossils can show how organisms have gradually changed over a long period of time. This process is called __________.

Fossils can be formed when conditions needed for __________ are absent.

Describe how fossils usually form.

Two scientists studied patterns of evolution in the fossil record. Many species they analyzed showed periods of slow changes interrupted by a period of rapid change. This pattern of periods of slow change interrupted by periods of rapid change with few, if any transitional fossils, best describes thetheory of —Ask Studybuddy (Login to use)Group of answer choicesGene FlowNatural SelectionGenetic DriftPunctuated Equilibrium

According to the theory of evolution, what causes living things on Earth to change over time?A.Natural processesB.Common ancestorsC.Individual choicesD.The fossil record

18. Which of the following come from types of organisms that lived during only a relatively short period of time and are used to determine the relative age of rocks? imprints index fossils trace fossils extrusions