Chapter 18: Classification

Question 1

What is the science of classifying organisms called?

Answer 1

Taxonomy

Question 2

True or False: The two main components of a scientific name are the genus and species.

Answer 2

True

Question 3

Fill in the blank: The highest taxonomic rank is _____.

Answer 3

Domain

Question 4

Which of the following is NOT a domain: Bacteria, Eukarya, Plantae?

Answer 4

Plantae

Question 5

What is the primary purpose of taxonomy?

Answer 5

To organize and categorize living organisms.

Question 6

In the Linnaean system, what rank comes after family?

Answer 6

Genus

Question 7

True or False: All organisms within a genus are closely related.

Answer 7

True

Question 8

What does the term ‘binomial nomenclature’ refer to?

Answer 8

The two-part naming system for species.

Question 9

Which taxonomic rank is below species?

Answer 9

Subspecies

Question 10

What is the genus name for humans?

Answer 10

Homo

Question 11

Fill in the blank: The classification system developed by Carl Linnaeus is known as _____.

Answer 11

Linnaean taxonomy

Question 12

True or False: The family taxonomic rank is broader than the order rank.

Answer 12

False

Question 13

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

Answer 13

They are often extremophiles and have unique biochemistry.

Question 14

Which kingdom includes multicellular photosynthetic organisms?

Answer 14

Plantae

Question 15

What is the primary criterion for classifying organisms into the same species?

Answer 15

The ability to interbreed and produce fertile offspring.

Question 16

Which taxonomic level is represented by the suffix ‘-aceae’?

Answer 16

Family

Question 17

Fill in the blank: Prokaryotic organisms are classified into two domains: Bacteria and _____.

Answer 17

Archaea

Question 18

True or False: All plants are classified in the kingdom Animalia.

Answer 18

False

Question 19

What is the main difference between the domains Bacteria and Archaea?

Answer 19

Their cellular structure and genetic makeup.

Question 20

What does the term ‘phylogeny’ refer to?

Answer 20

The evolutionary history and relationships among species.

Question 21

Which classification level is most specific?

Answer 21

Species

Question 22

Fill in the blank: The classification of organisms based on evolutionary relationships is known as _____.

Answer 22

Cladistics

Question 23

True or False: The classification system is static and does not change over time.

Answer 23

False

Question 24

What is the primary basis for modern classification systems?

Answer 24

Genetic and molecular data.

Question 25

Which kingdom is characterized by heterotrophic organisms that absorb nutrients?

Answer 25

Fungi

Question 26

Fill in the blank: The science of naming organisms is called _____.

Answer 26

Nomenclature

Question 27

What is the taxonomic rank above kingdom?

Answer 27

Domain

Question 28

True or False: Viruses are classified in the same kingdoms as living organisms.

Answer 28

False

Question 29

What type of classification groups organisms based on physical traits?

Answer 29

Morphological classification

Question 30

Fill in the blank: The classification system that uses shared derived characteristics is called _____.

Answer 30

Cladistics

Question 31

Which of the following is a characteristic of the kingdom Animalia? A) Photosynthesis B) Multicellular C) Autotrophic

Answer 31

B) Multicellular

Question 32

What is the taxonomic rank that includes multiple genera?

Answer 32

Family

Question 33

True or False: The classification of organisms is solely based on physical characteristics.

Answer 33

False

Question 34

What is the primary method of determining evolutionary relationships among organisms?

Answer 34

Molecular phylogenetics

Question 35

Fill in the blank: The taxonomic hierarchy is usually represented as a _____.

Answer 35

Tree

Question 36

Which classification system is often used in modern biology?

Answer 36

Three-domain system

Question 37

What does the term 'sympatric speciation' refer to?

Answer 37

The evolution of new species from a common ancestor while inhabiting the same geographic region.

Question 38

Fill in the blank: The classification level below order is called _____.

Answer 38

Family

Question 39

True or False: The species name is always italicized in scientific writing.

Answer 39

True

Question 40

What is the primary focus of systematics in biology?

Answer 40

To classify organisms based on evolutionary relationships.

Question 41

Which of the following is a method used for classifying organisms? A) Morphological B) Genetic C) Behavioral D) All of the above

Answer 41

D) All of the above

Question 42

What does the term 'endemic species' refer to?

Answer 42

Species that are native to a specific geographic area.

Question 43

Fill in the blank: Organisms that are more closely related will share a more recent common _____.

Answer 43

Ancestor

Question 44

What is the primary characteristic of organisms in the kingdom Protista?

Answer 44

They are mostly unicellular and eukaryotic.

Question 45

True or False: All members of the same family share the same genus.

Answer 45

True

Question 46

What does 'phylogenetic tree' illustrate?

Answer 46

The evolutionary relationships among different species.

Question 47

Fill in the blank: The process by which new species arise is known as _____.

Answer 47

Speciation

Question 48

What is the first step in the classification of a new organism?

Answer 48

Determining its kingdom.

Question 49

True or False: All eukaryotic organisms are classified in the domain Eukarya.

Answer 49

True

Question 50

Which of the following is an example of a dichotomous key?

Answer 50

A tool used to identify organisms based on a series of choices.