Catastrophism and Evolutionary Theories

What is gradualism?

• Gradualism is the theory that evolutionary changes occur slowly and gradually over time.
• Gradualism is the idea that all evolutionary changes are reversible.
• Gradualism states that species remain unchanged for long periods.
• Gradualism is the belief that evolution happens in sudden bursts.

What is evidence of gradualism?

• Fossil records showing transitional forms and small changes in species.

• Fossil records showing no changes in species.
• Genetic mutations that do not lead to gradual changes.
• Evidence of sudden catastrophic events in evolution.

What is punctuated equilibrium?

• A theory describing evolution as long periods of stability interrupted by short bursts of significant change.

• A model that describes evolution as a linear process without interruptions.
• A concept that suggests species evolve only through gradual changes over time.
• A theory that states evolution occurs at a constant rate.

What is catastrophism?

• Catastrophism is the theory that Earth's features are shaped by natural disasters.

• Catastrophism is a theory that denies the occurrence of any natural disasters.
• Catastrophism suggests that Earth's features are solely the result of human activity.
• Catastrophism is the belief that all geological features are formed gradually over time.

What do scientists support as a likely theory of evolution? Gradualism or punctuated equilibrium?

• punctuated equilibrium
• gradualism

• neither punctuated equilibrium or gradualism

• both punctuated equilibrium and gradualism