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Evolutionary Novelties

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Questions and Answers

Which of the following best describes the evolution of complex structures?

They evolved from simpler versions that performed different functions.

They evolved in increments from simpler versions that performed the same basic function. (correct)

They evolved from unrelated structures through convergent evolution.

They evolved suddenly without any intermediate forms.

What are the simplest eyes composed of?

Patches of light-sensitive photoreceptor cells (correct)

Light-sensitive pigments

Photoreceptor cells and lenses

Complex structures with multiple layers

What must be considered when identifying evolutionary trends?

Only extant species

Only extinct species

All fossils, including those from extinct lineages (correct)

Only fossils from the most recent time period

Which example shows a trend toward large, single-toed species?

Horses Signup and view all the answers

According to the species selection model, what determines evolutionary trends?

Differential speciation success Signup and view all the answers

Do evolutionary trends imply an intrinsic drive toward a particular phenotype?

No Signup and view all the answers

What is the result of evolution?

Interaction between organisms and their current environments Signup and view all the answers

What is the main focus of evolutionary trends?

Extant species Signup and view all the answers

What is the relationship between complex structures and simpler versions?

Complex structures can evolve in increments from simpler versions that performed the same basic function. Signup and view all the answers

What determines the success of speciation in the species selection model?

Differential reproductive success Signup and view all the answers