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Fossil Formation and Phylogeny Study Questions

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Fossil Formation and Phylogeny Study Questions

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Questions and Answers

We prefer the most complex tree when constructing a phylogeny.

False

The most parsimonious tree is the one that requires the fewest evolutionary changes to explain the observed data.

True

A polyphyletic group includes the most recent common ancestor and all of its descendants.

False

An apomorphy is a characteristic that is shared by two or more taxa and inherited from a common ancestor.

False Signup and view all the answers

The fossil record has no limitations or biases, providing a complete and accurate representation of past life forms.

False Signup and view all the answers

What is the significance of the End-Cretaceous mass extinction event?

It marked the extinction of dinosaurs and many other species Signup and view all the answers

Why is the End-Cretaceous mass extinction event considered a significant turning point in Earth's history?

It marked the beginning of the Cenozoic Era Signup and view all the answers

What is the impact of the End-Cretaceous mass extinction event on the fossil record?

It caused a loss of many existing species, leading to gaps in the fossil record Signup and view all the answers

How did the End-Cretaceous mass extinction affect terrestrial ecosystems?

It triggered widespread wildfires and deforestation Signup and view all the answers

What role did the End-Cretaceous mass extinction event play in shaping the evolution of mammals?

It led to the diversification and expansion of mammalian species Signup and view all the answers