Evolution of Anolis Lizards

The population of Anolis cristatellus that you analyzed lives in a shady, forest environment and A. cooki in an open, sunny environment. Which statement best explains why these lizards live where they do?

• Anoles cristatellus has a brighter dewlap that's easier to see in a shady environment

• There is a selection for shorter legs on the experimental island and for longer legs on Iron cay

• The anole species on Puerto Rico and Hispaniola evolved from a common ancestor

• In different environments, different variations in traits provide an advantage

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Based on what you have learned so far, what is the most likely explanation for why the same ecomorphs evolved on both Puerto Rico and Hispaniola?

• The ones on Iron cay

• Both islands have similar habitats

• Similar adaptations evolved on different islands

• The lizards on both islands have the same mutation rate

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The group of Anolis sagrei on the experimental island had shorter legs on average than the A. sagrei on Iron Cay. What is a likely explanation for this finding?

• they have long legs adapted to perching on broad tree trunks and running fast on the ground

• the same types of anole lizards evolved independently on each of the islands.

• yes, anoles crystals has a brighter dewlap that's easier to see in a shady environment

• there is a selection for shorter legs on the experimental island and for longer legs on Iron cay

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Based on what Dr. Jonathan Losos said, why have different lizard species evolved to occupy different parts of the habitats?

• Both islands have similar habitats

• The anole species on Puerto Rico and Hispaniola evolved from a common ancestor

• In different environments, different variations in traits provide an advantage

• To minimize competition for food and other resources between different species

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On Puerto Rico and Hispaniola, you find the same...

• polymorphism

• ecomorphs

• biogeography

• convergent evolution

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Which of the following features may differ among different ecomorph groups?

• relative tail length

• relative hindlimb length

• number of toepad lamellae

• all of the above

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The anole species on Puerto Rico and Hispaniola evolved from a common ancestor.

• True

• False

• Not mentioned

• The text refers to a different species

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Which of the following statements accurately describes the results of the experiment?

• The anole species on Puerto Rico and Hispaniola evolved from a common ancestor

• Relative tail length

• Relative hindlimb length

• Similar adaptations evolved on different islands

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Why did you need to calculate relative hindlimb length rather than absolute hindlimb length?

• to minimize competition for food and other resources between different species

• to control for the effects of body size when making comparisons

• the anole species on Puerto Rico and Hispaniola evolved from a common ancestor

• in different environments, different variations in traits provide an advantage

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According to Dr. Losos, the independent evolution of similar species on the different islands is an example of which of the following processes?

• adaptive radiation

• homologous structures

• homology

• convergent evolution

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