Evolution at Different Scales: Character Change in Trilobites

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What does stasis refer to in the context of macroevolution?

Partial change in lineages over time

Rapid change in lineages over time

Random changes in lineages over time

No change in lineages over time (correct)

Which macroevolutionary pattern involves significant changes in the characteristics of species over time?

Stasis

Speciation

Character Change (correct)

Extinction

What is the term for the production of new species from existing ones?

Extinction

Character Change

Stasis

Speciation (correct)

Which macroevolutionary pattern involves the disappearance of entire lineages or groups of organisms?

Extinction Signup and view all the answers

In macroevolution, what characterizes 'living fossils' like the Coelacanth?

No change in traits over time Signup and view all the answers

Which macroevolutionary pattern involves the creation of new traits or features in species?

Character Change Signup and view all the answers

What is an example of character change mentioned in the text?

Evolving additional segments Signup and view all the answers

Which term is used to describe lineage-splitting in evolution?

Speciation Signup and view all the answers

What is the significance of constructing and examining a phylogeny in evolutionary studies?

Identifying patterns in macroevolution Signup and view all the answers

How can extinction be avoided according to the text?

Introduction of nonnative/invasive species Signup and view all the answers

What percentage of species that have existed on Earth are estimated to have gone extinct?

>99% Signup and view all the answers

Which factor is NOT listed as a cause of extinction in the text?

Increased genetic diversity Signup and view all the answers

What is microevolution defined as?

Genetic change at a population or below species level Signup and view all the answers

In microevolution, what does gene frequency represent?

The prevalence of specific alleles in the gene pool Signup and view all the answers

What is an example of microevolution?

Increase in gene frequency for brown coloration in beetles Signup and view all the answers

Which term describes long-term changes above the species level?

Speciation Signup and view all the answers

What is macroevolution primarily concerned with?

Changes that affect lineages and the appearance of organisms Signup and view all the answers

Which concept is associated with macroevolution?

Mass extinctions affecting multiple species Signup and view all the answers