Question 1

Which of the following best describes the purpose of binomial nomenclature as proposed by Carolus Linnaeus?

Accepted Answer

To create a universal naming language that avoids redundancy and confusion in species names.

Question 2

Carl Woese added a new taxonomic rank above Kingdom. What is this rank, and what is its primary significance?

Accepted Answer

Domain; it separates Bacteria, Archaea, and Eukarya based on fundamental cellular differences.

Question 3

In a phylogenetic tree, what does a node represent?

Accepted Answer

A common ancestor from which descendant taxa diverged.

Question 4

Which of the following is a correct hierarchical order in modern biological classification, starting from the broadest category?

Accepted Answer

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

Question 5

A biologist is constructing a phylogenetic tree using a data matrix of morphological traits. What is the primary advantage of including an outgroup in the analysis?

Accepted Answer

It helps identify which traits are derived and which are ancestral.

Question 6

Which of the following scenarios best illustrates adaptive radiation?

Accepted Answer

A single ancestral species of cichlid fish diversifies into many species after lakes form due to natural dams.

Question 7

Which of the following is NOT a possible consequence of mass extinction events?

Accepted Answer

Immediate increase in the population of all carnivores.

Question 8

Which feature distinguishes Eukarya from Bacteria and Archaea?

Accepted Answer

Presence of a membrane-bound nucleus.

Question 9

If a volcanic eruption causes a decline in sunlight, which trophic level is likely to be affected first?

Accepted Answer

Producers (plants)

Question 10

Which of the following statements about phylogenetic trees is TRUE?

Accepted Answer

Phylogenetic trees can be rotated at each node without changing their meaning.

Question 11

A population of birds develops the ability to fly, which allows them to access new food sources and escape predators. This is an example of:

Accepted Answer

Adaptive radiation due to altered food availability and predation risk.

Question 12

Which equation best represents the timeline of Earth's history, given that the formation of Earth occurred 4.6 billion years ago and the origin of life occurred 3.5 billion years ago?

Accepted Answer

$$4.6 	imes 10^9$ - 3.5 	imes 10^9$ = 1.1 	imes 10^9$ years between Earth's formation and the origin of life.

Question 13

Which of the following is a real-world example of how adaptive radiation can lead to speciation?

Accepted Answer

Hawaiian silverswords evolving from a single tarweed ancestor into over 30 species in 2 million years.

Question 14

Which of the following is a plausible reason why most cichlid fish species are only found in one lake?

Accepted Answer

Reproductive isolation due to geographic barriers and adaptive radiation.

Question 15

Which of the following best explains why mass extinction events can result in increased numbers of scavengers and fungi?

Accepted Answer

Dead organic matter from extinct species provides abundant resources for decomposers.

Question 16

Which of the following is NOT a valid method for naming organisms, according to the problems with traditional approaches?

Accepted Answer

Assigning names based on random numbers.

Question 17

Which of the following is a derived trait in the data matrix used to build a phylogenetic tree for vertebrates?

Accepted Answer

Presence of hair in mammals.

Question 18

Which of the following best describes the process of building a phylogenetic tree using a data matrix?

Accepted Answer

Organisms are grouped based on shared derived traits, allowing inference of evolutionary relationships.

Question 19

Which of the following is a correct application of the concept of an outgroup in phylogenetic analysis?

Accepted Answer

Using a closely related taxon outside the group of interest to help determine ancestral traits.

Biological Diversity: Phylogenies and the History of Life (Lectures 8 & 9)

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