Introduction to Phylogenetic Trees

According to the text, what is a clade?

• A group of species that includes a common ancestor and all its descendants

• A group of species that excludes one or more descendants

• A group of species that excludes the common ancestor

• A group of species that are not closely related

What is the purpose of phylogenetic trees in biology?

• To organize and classify the diversity of life on Earth.

• To show the evolutionary history of different species.

• To represent the Linnaean system of classification.

• To analyze the heritable features of organisms.

How does time representation work in a phylogenetic tree?

• Time is represented horizontally, with the oldest on the left and the most recent on the right.

• Time is represented vertically, with the oldest at the top and the most recent at the bottom.

• Time is represented diagonally, with the oldest on the bottom left and the most recent on the top right.

• Time is not represented in a phylogenetic tree.

What is the purpose of taxonomy in biology?

• To organize and classify the diversity of life on Earth.

• To show the evolutionary history of different species.

• To represent the Linnaean system of classification.

• To analyze the heritable features of organisms.

What does it mean if a group of species is paraphyletic?

• It includes a common ancestor and all its descendants.

• It excludes one or more descendants.

• It excludes the common ancestor.

• It is not closely related to other species.

What do phylogenetic trees represent?

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Answer explanation

Phylogenetic trees represent the evolutionary history and relationships among different species.