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Maximum Parsimony in Molecular Systematics

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Maximum Parsimony in Molecular Systematics

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Questions and Answers

According to maximum parsimony, what is the assumption about the most likely tree?

The most likely tree is the one with the fewest shared derived characters (correct)

The most likely tree is the one with the most shared derived characters

The most likely tree is the one with the fewest evolutionary events

The most likely tree is the one with the most evolutionary events

What do all phylogenetic trees represent?

Hypotheses about how organisms are related to each other (correct)

Theories about how organisms are related to each other

Opinions about how organisms are related to each other

Facts about how organisms are related to each other

What is the best hypothesis in phylogenetic trees?

The one that fits only molecular data

The one that fits only morphological data

The one that fits only fossil data

The one that fits all available morphological, molecular, and fossil data (correct)

What does Figure 20.18 provide support for?

The prediction that dinosaurs built nests and brooded their eggs Signup and view all the answers

What does the orientation of the bones surrounding the eggs suggest in Figure 20.18?

The dinosaur died while incubating or protecting its eggs Signup and view all the answers

What is the focus of the research method shown in Figure 20.15?

Applying maximum parsimony to a problem in molecular systematics Signup and view all the answers

What is the main purpose of phylogenetic trees?

To represent hypotheses about the relationships between organisms Signup and view all the answers

What is the copyright information for Figure 20.16?

What is the copyright information for Figure 20.18?

What is depicted in Figure 20.16?

A phylogenetic tree of birds and their close relatives Signup and view all the answers

Study Notes

Maximum Parsimony

The tree with the fewest evolutionary changes is considered the most likely tree.

Phylogenetic Trees

They represent the evolutionary history of a group of organisms.

Best Hypothesis

The best hypothesis in phylogenetic trees is the one that requires the fewest evolutionary changes to explain the observed data.

Figure 20.18

It provides support for the hypothesis that dinosaurs nested and cared for their young.

Orientation of Bones

The orientation of the bones surrounding the eggs in Figure 20.18 suggests that the dinosaur was protecting its nest.

Figure 20.15

The research method shown in Figure 20.15 focuses on comparing DNA sequences to create a phylogenetic tree.

Purpose of Phylogenetic Trees

To illustrate the evolutionary relationships between different organisms.

Copyright information

Figure 20.16

It depicts a phylogenetic tree based on DNA sequences, illustrating the evolutionary relationships between different species, including humans.

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Description

Test your knowledge on the concept of maximum parsimony, a method used in molecular systematics. Learn about the assumption that the most likely tree is the one that requires the fewest evolutionary events. Take this quiz to assess your understanding of this research method.