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Module 6: Systematics Based on Evolutionary Relationships Quiz

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Module 6: Systematics Based on Evolutionary Relationships Quiz

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Questions and Answers

What is the study of identifying, naming, and classifying living things in relation to other living things known as?

Taxonomy (correct)

Phylogenetic tree

Evolutionary relationships

Morphology

Why are classifications constantly updated and changed according to the text?

Biologists like to confuse others

Due to new data altering our understanding of evolutionary relationships (correct)

For no particular reason

Because there are no correct classifications

What does systematics study according to the text?

Nomenclature of organisms

Morphological changes in organisms

Evolutionary relationships among organisms (correct)

Physical attributes of organisms

How long ago did living organisms begin to diversify and adapt to almost every environment?

3.7 billion years Signup and view all the answers

What do all living organisms share despite their enormous diversity?

Common ancestry Signup and view all the answers

What was taxonomy traditionally based on according to the text?

Morphology Signup and view all the answers

What type of data do systematists use to infer evolutionary relationships?

Fossils, molecules, and genes Signup and view all the answers

Why is it generally agreed that grouping organisms according to shared evolutionary history is the most useful way to organize biological diversity?

Due to common ancestry Signup and view all the answers

How are derived characters represented on a phylogenetic tree?

Above the main lower line Signup and view all the answers

What is the purpose of constructing a phylogenetic tree of life?

To classify organisms according to shared evolutionary history Signup and view all the answers

Which criterion is considered the most useful for organizing biological diversity?

Shared evolutionary history Signup and view all the answers

What do systematists use DNA sequences for in classifying living things?

To determine shared evolutionary history Signup and view all the answers

What does tree thinking, or phylogenetic thinking, help us with?

Determining the branching evolutionary relationships between species Signup and view all the answers

In the Three Domain System, how are organisms primarily classified?

Based on differences in ribosomal RNA structure Signup and view all the answers

What is the last universal common ancestor (LUCA)?

A common ancestor cell from which all cells are believed to have evolved Signup and view all the answers

What is the main characteristic of organisms in the Archaea domain?

Contain genes similar to both bacteria and eukaryotes Signup and view all the answers

What has genetic sequencing provided researchers with?

A new way of analyzing relationships between organisms Signup and view all the answers