Question 1

Which of the following best describes a phylogeny?

Accepted Answer

The evolutionary history of a species or group of species.

Question 2

In binomial nomenclature, which of the following is the correct way to write the scientific name for humans?

Accepted Answer

$Homo\ sapiens$

Question 3

Which taxonomic category is more inclusive than 'Order' but less inclusive than 'Kingdom'?

Accepted Answer

Class

Question 4

A biologist is studying the evolutionary relationships among several bird species using both DNA sequences and bone structure. This approach is an example of:

Accepted Answer

Systematics

Question 5

Which of the following statements about phylogenetic trees is correct?

Accepted Answer

They show proposed relationships of taxa based on shared ancestry.

Question 6

Which of the following is an example of convergent evolution?

Accepted Answer

The similar body shape of dolphins (mammals) and sharks (fish) due to adaptation to aquatic environments.

Question 7

A group that includes a common ancestor and all of its descendants is called:

Accepted Answer

Monophyletic

Question 8

Which of the following best describes a paraphyletic group?

Accepted Answer

A group that includes the common ancestor and some, but not all, of its descendants.

Question 9

In constructing a phylogenetic tree, which type of trait is most useful for determining evolutionary relationships?

Accepted Answer

Derived traits (synapomorphies)

Question 10

Which of the following scenarios illustrates the use of homology in phylogenetic analysis?

Accepted Answer

Grouping bats and humans together based on the presence of a pentadactyl limb inherited from a common ancestor.

Question 11

A scientist discovers a new organism and wants to classify it. Which hierarchical taxonomic rank should the scientist assign first?

Accepted Answer

Kingdom

Question 12

Which of the following is NOT a requirement for a clade to be considered monophyletic?

Accepted Answer

It must include only species with similar ecological roles.

Question 13

Which of the following best explains why dolphins and sharks have similar body shapes?

Accepted Answer

They have independently evolved similar adaptations due to similar environments (convergent evolution).

Question 14

If a group contains members from different lineages and does not include their most recent common ancestor, it is considered:

Accepted Answer

Polyphyletic

Question 15

Which of the following is the correct order of taxonomic ranks from most inclusive to least inclusive?

Accepted Answer

Kingdom, Phylum, Class, Order, Family, Genus, Species

Question 16

A researcher is comparing DNA sequences to infer evolutionary relationships among primates. This method relies on which type of data?

Accepted Answer

Molecular data

Question 17

Which of the following is an example of a derived trait (synapomorphy) in mammals?

Accepted Answer

The presence of mammary glands

Question 18

Why is it important to use both morphological and molecular data when constructing phylogenies?

Accepted Answer

Using both types of data provides a more comprehensive understanding of evolutionary relationships.

Question 19

Which of the following best describes the difference between homology and analogy?

Accepted Answer

Homology refers to similarities due to shared ancestry, while analogy refers to similarities due to convergent evolution.

Question 20

A taxonomist is classifying a group of organisms that share a common ancestor and all of its descendants, but excludes one descendant group. This group is:

Accepted Answer

Paraphyletic

Ch. 20 Phylogeny, Systematics, and Classification: Study Notes

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