Unit 2.3 Patterns of Evolutions

What describes the change in the genetic make-up of a species over a period of time?

• Species

• Evolution

• Gradualism

• Punctuated equilibrium

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What is shown in diagram as an evidence of evolution?

• Homologous structures (structures have similar functions) b/c the bird and bat live in similar environments

• Analogous structures (structures have similar functions) b/c the bird and bat live in similar environments

• Homologous structures (structures have different functions) b/c the bird and bat live in different environments

• Analogous structures (structures have different functions) b/c the bird and bat live in different environments

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Quite often we see organisms that have similar characteristics, not because they have arisen from a common ancestor, but because they have adapted to similar environments. Which type of evolution is this?

• Divergent evolution

• Convergent evolution

• Punctuated equilibrium

• Coevolution

The hypothesis that evolution of a species occurs gradually over time as a slow and constant process is known as

• speciation
• punctuated equilibrium
• gradualism
• microevolution

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This pattern of evolution describes short bursts of evolutionary change in a population of organisms, followed by periods of stability (no change).

• Gradualism

• Coevolution

• Punctuated Equilibrium

• Speciation

The model that predicts evolution occurs in rapid bursts followed by long periods of no change is called...

• gradualism
• punctuated equilibrium
• adaptive radiation
• convergent evolution 

The theory that evolution happens slowly and steadily

• Punctuated equilibrium

• Gradualism

• Hardy-Weinburg equilibrium

• Divergent Evolution

Fossil evidence suggests that whales evolved from land mammals. This was a slow process over thousands of years that resulted from continual reduction of the ancestral mammals forelimbs over time, until they were reduced to fins. What pattern of evolution is this?

• Coevolution

• Convergent Evolution

• Gradualism

• Punctuated Equilibrium

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Differences in the physical traits of organisms are called

• Adaptation

• Variation

• Overproduction of Offspring

• Descent with Modification

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A change in gene frequency over time so more beneficial traits become more common in a population is called

• Adaptation

• Variation

• Overproduction of Offspring

• Descent with Modification

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