Question

A diagram shows two models for the tempo of speciation. Model a shows a punctuated model. The species changes the most as it branches from its parent species. It changes very little for the rest of its existence. A line from left to right shows the passage of time. Model b is a gradual model. It shows how species diverge from a parent species more slowly and steadily over time

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Two models for the speed of speciation are based on patterns in the fossil record. Which of the following statements describes the punctuated equilibrium model of evolution?

Natural selection is unimportant as a mechanism of evolution.
Most evolution occurs in sympatric populations.
Given enough time, most existing species will gradually branch into new species.
Species accumulate their unique features rapidly, then change little for the duration of the species.

Answer 1

The punctuated equilibrium model of evolution suggests that species undergo rapid change to form new species and then have long periods of little to no change, often observed as bursts of change in the fossil record.

Step-by-step explanation:

The punctuated equilibrium model of evolution describes the process where species accumulate their unique features rapidly, and then change very little for the rest of their existence. This model begins with a punctuated or abrupt change and then the species remains in balance, experiencing long periods of stasis followed by rapid and significant changes. The punctuated equilibrium model suggests that rapid changes happen due to a variety of environmental factors, leading to the quick differentiation from a parent species, and these periods of evolution are often reflected in the fossil record as bursts of change amidst long durations of little or no change.

Answer 2

Species accumulate their unique features rapidly, then change little for the duration of the species.

Step-by-step explanation:

Got it correct.

Also, look at the two images. One image shows no change in the butterflies over time but the other does show how they evolved and then maintained their appearance for a while.