Question 1

Which of the following best describes a monophyletic group in a phylogenetic tree?

Accepted Answer

A group that includes an ancestor and all of its descendants.

Question 2

In the context of phylogenetic trees, what does the 'one snip' test help you identify?

Accepted Answer

Whether a group is monophyletic.

Question 3

If a novel trait appears only once and is never lost, what is the most parsimonious explanation for its distribution among species?

Accepted Answer

All species with the trait inherited it from a common ancestor.

Question 4

Which of the following is a synapomorphy for mammals, based on the provided phylogeny?

Accepted Answer

Fur and lactation

Question 5

Given the following traits: jaws, limbs, amniotic egg, and fur, which trait would you expect to find in both lizards and mammals but not in lampreys?

Accepted Answer

Jaws

Question 6

If you are mapping the evolution of a pouch in marsupials, where should you place the origin of this trait on a phylogenetic tree containing koalas, kangaroos, and opossums?

Accepted Answer

At the most recent common ancestor of all marsupials.

Question 7

Which group is more closely related to lampreys: ray-finned fishes or lizards?

Accepted Answer

Ray-finned fishes

Question 8

Which of the following statements is correct regarding the evolutionary relationships among moose, rats, humans, elephants, koalas, and kangaroos?

Accepted Answer

{ elephants, humans, rats } is a monophyletic group.

Question 9

Which of the following best describes parsimony in phylogenetic analysis?

Accepted Answer

The simplest explanation with the fewest evolutionary changes is preferred.

Question 10

A researcher finds that both snakes and lizards have lost their limbs. Using parsimony, what is the most likely explanation?

Accepted Answer

Limbs were lost once in the common ancestor of snakes and lizards.

Question 11

Which of the following is NOT a step in inferring phylogenetic relationships using trait data?

Accepted Answer

Estimating the age of each species using radiometric dating.

Question 12

If a group of species shares a derived trait that is not found in their common ancestor, what is this trait called?

Accepted Answer

Synapomorphy

Question 13

Which of the following scenarios would violate the assumption of parsimony in trait evolution?

Accepted Answer

A trait is lost and then regained multiple times in different lineages.

Question 14

Which of the following is the best definition of a node on a phylogenetic tree?

Accepted Answer

A point representing the most recent common ancestor of descendant lineages.

Question 15

If you want to determine whether koalas and kangaroos form a monophyletic group, what should you do?

Accepted Answer

Use the 'one snip' test to see if a single cut can separate them and their common ancestor from the rest of the tree.

Question 16

Which of the following is an example of a real-world application of phylogenetic analysis?

Accepted Answer

Tracing the origin and spread of a viral outbreak using genetic data.

Question 17

Which of the following statements about the three-spined stickleback is correct based on the study materials?

Accepted Answer

It is less than 8 cm long and can be found in Lake Washington.

Question 18

Which of the following best describes the relationship between lizards, snakes, and mammals based on the phylogeny provided?

Accepted Answer

Lizards and snakes are more closely related to each other than either is to mammals.

Question 19

Which of the following is a correct interpretation of a phylogenetic tree?

Accepted Answer

The order of tips (left to right) does not affect the relationships shown.

Inferring Phylogenies: Principles and Practice

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