Biology Chapter 2 Unit B Review

Questions and Answers

What is classification?

The process of arranging organisms into groups based on similarities.

How does classification help?

A good classification system can help identify unfamiliar organisms and organize information.

Do the levels of classification become broader or more specific?

More specific.

What is taxonomy?

The science of naming and classifying organisms. Signup and view all the answers

How does taxonomy help?

It allows people to communicate about organisms. Signup and view all the answers

What do taxonomists do and why is it important?

Taxonomists name and classify organisms based on characteristics. Signup and view all the answers

What is the difference between taxonomy and classification?

Taxonomy is the science of naming and classifying organisms, whereas classification is the process used for this. Signup and view all the answers

What are the levels of classification?

Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species. Signup and view all the answers

What is a taxon?

A group of organisms that share a certain trait. Signup and view all the answers

What is Binomial Nomenclature?

A system for naming species that is the basis of taxonomy. Signup and view all the answers

What two words make up Binomial Nomenclature?

Genus and species. Signup and view all the answers

Why are the two organisms Felis Catus and Felis silvestris closely related?

They share the same Genus name. Signup and view all the answers

What is a genus?

A group of species that have similar characteristics. Signup and view all the answers

What is a species?

A group of organisms that share characteristics and are capable of reproducing. Signup and view all the answers

Based on Binomial Nomenclature, how can you tell what organisms are closely related?

If they have the same Genus. Signup and view all the answers

What is a Dichotomous Key?

A tool for identifying organisms with a series of questions that have only two possible answers. Signup and view all the answers

What is a Field Guide?

A tool that allows scientists to classify organisms. Signup and view all the answers

What is a domain?

A larger group that kingdoms are arranged into. Signup and view all the answers

Why did scientists add the classification level Domain?

To categorize different types of cells observed using advanced technology. Signup and view all the answers

What are the six kingdoms?

Animalia, Plantae, Protista, Fungi, Archaea, and Bacteria. Signup and view all the answers

What are the three domains and what kingdoms fall into each?

Eukarya (Animalia, Plantae, Fungi, Protista), Bacteria (Bacteria), Archaea (Archaea). Signup and view all the answers

Why do certain organisms belong in a specific domain?

Based on characteristics like cell number, energy acquisition, and nuclear presence. Signup and view all the answers

What defines the kingdom Animalia?

Animal cells are multicellular and eukaryotic and can move around. Signup and view all the answers

Study Notes

Classification and Taxonomy

Classification organizes organisms into groups based on shared characteristics.
Effective classification aids in identifying unfamiliar organisms and streamlining information organization.

Levels of Classification

Classification levels become more specific with each descending category.
Sequence of classification levels: Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species.

Taxonomy Explained

Taxonomy is the scientific discipline of naming and classifying organisms.
Taxonomists categorize organisms by their characteristics, enhancing communication about them.

Taxon and Binomial Nomenclature

A taxon is a group of organisms sharing specific traits.
Binomial nomenclature is a two-word naming system for species, developed by Carolus Linnaeus.
In this system, the Genus name is capitalized, while the species name is lowercase, both italicized.

Organism Relationships

Organisms sharing a Genus name are closely related, indicating shared classification levels.
Examples include Felis Catus and Felis silvestris, both in the same Genus.

Identifying Organisms

A dichotomous key helps identify organisms through a series of binary questions, narrowing possibilities.
Field guides classify organisms with photographs and habitat maps.

Domains and Kingdoms

Organisms are classified into three domains: Eukarya, Bacteria, and Archaea.
Eukarya includes the kingdoms Animalia, Plantae, Fungi, and Protista; Bacteria and Archaea are separate kingdoms.
The domain classification emerged from advances in microscopy that revealed three cellular types.

Characteristics and Domain Classification

Characteristics such as cellular composition, energy acquisition, and nuclear presence determine domain classification.
Kingdom Animalia includes multicellular and eukaryotic organisms with mobility.

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Test your knowledge on the principles of classification in biology with these flashcards. This quiz covers key concepts and definitions that help you understand how organisms are grouped. Enhance your understanding of categorization and its significance in biological sciences.