Question

the theory of punctuated equilibrium states that evolutionary change is characterized by short bursts of change followed by extended periods with little or no change. which picture below best represents punctuated equilibrium?
select one:
○ a.
image of a graph with changes in phenotypes on the x - axis and some fossil markings
○ b.
image of a graph with changes in phenotypes on the x - axis and some fossil markings

Explanation:

Punctuated equilibrium features long stretches of stasis (no phenotypic change) shown as flat horizontal lines, interrupted by sudden short bursts of evolutionary change (vertical jumps in phenotype). Graph a has flat periods with rapid vertical shifts matching this, while graph b shows gradual, continuous phenotypic change over time, which aligns with gradualism instead.

Answer:

a. [Graph with flat horizontal lines (stasis) interrupted by vertical jumps in phenotype, with fossil markers at the transitions]