According to the punctuated equilibrium model of evolution, __________.

• A. isolated species changing over a few thousand generations represent graduated equilibrium, not punctuated equilibrium
• B. polyploidy is not a mechanism of punctuated equilibrium
• C. fossils of organisms that existed during periods of stasis should be as abundant as those of organisms that existed during periods of rapid change
• D. None of the listed responses is correct.
• E. the tempo of evolution consists of abrupt episodes of speciation among long periods of equilibrium

Answer: (E)

Verified step by step guidance

1. Understand the concept of punctuated equilibrium: It is a model of evolution which suggests that species experience long periods of stability (stasis) interrupted by brief periods of rapid change, often associated with speciation events.
2. Identify the key characteristics of punctuated equilibrium: This model contrasts with gradualism, where evolutionary changes occur slowly and steadily over time.
3. Analyze the options given in the problem: Evaluate each statement to determine if it aligns with the concept of punctuated equilibrium.
4. Consider the correct answer: The tempo of evolution consists of abrupt episodes of speciation among long periods of equilibrium, which aligns with the definition of punctuated equilibrium.
5. Conclude by recognizing that the correct understanding of punctuated equilibrium involves recognizing the pattern of long stasis interrupted by rapid evolutionary changes.