Biology Classification Quiz

Questions and Answers

How are organisms hierarchically classified based on evolutionary relationships?

Based on their color

Based on their differences and similarities (correct)

Based on their habitat

Based on their size

What is the reason for changes in how organisms are classified?

New classification sets are found, or new information is discovered about that organism.

How did scientists infer relationships among organisms for classification purposes using observation?

Similar organisms look similar, helping relate them to each other.

What are the distinguishing characteristics of Domain Bacteria?

Prokaryotic cells and rRNA unique to the bacteria. Signup and view all the answers

What are the distinguishing characteristics of Domain Eukarya?

Eukaryotic cells, not all have cell walls, resistant to antibacterial antibiotics, rRNA unique to the Eukarya. Signup and view all the answers

What are the distinguishing characteristics of Domain Archaea?

Prokaryotic cells, rRNA unique to Archaea, not sensitive to some antibiotics affecting Bacteria. Signup and view all the answers

What are the distinguishing characteristics of Kingdom Animalia?

Multicellular, eukaryotic heterotrophs that develop from embryos. Signup and view all the answers

What are the distinguishing characteristics of Kingdom Fungi?

Eukaryotic, decomposers, no chlorophyll, mostly multicellular, non-motile, absorb food after digestion. Signup and view all the answers

What are the distinguishing characteristics of Kingdom Plantae?

Multicellular, autotrophic eukaryotes that conduct photosynthesis and have chlorophyll. Signup and view all the answers

What are the distinguishing characteristics of Kingdom Protista?

Simple eukaryotic organisms, can be hetero or autotrophic, mostly live in water. Signup and view all the answers

What are the distinguishing characteristics of Kingdom Archaea?

Single-celled microorganisms that are prokaryotes. Signup and view all the answers

What are the distinguishing characteristics of Kingdom Bacteria?

Prokaryotes with cell walls containing peptidoglycans, unicellular, can be autotrophic or heterotrophic. Signup and view all the answers

Study Notes

Organism Classification

Organisms are classified based on evolutionary relationships using a hierarchical system: Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species.
Classification is influenced by similarities and differences among organisms.

Changes in Classification

Classification can change due to discovery of new classification sets or new information about organisms.

Observations for Classification

Similar appearances among organisms can indicate evolutionary relationships.

Domain Bacteria Characteristics

Composed of prokaryotic cells.
Contains unique ribosomal RNA (rRNA) specific to bacteria.

Domain Eukarya Characteristics

Comprised of eukaryotic cells.
Not all members possess cell walls.
Resistant to antibacterial antibiotics.
Features unique ribosomal RNA specific to Eukarya.

Domain Archaea Characteristics

Consists of prokaryotic cells.
Contains unique ribosomal RNA (rRNA) exclusive to Archaea.
Resistant to some antibiotics affecting Bacteria, but sensitive to certain antibiotics that target Eukarya.

Kingdom Animalia Characteristics

Multicellular, eukaryotic, and heterotrophic organisms.
Develop from embryos.
Estimated to contain 9 to 10 million species.
Capable of complex movements.

Kingdom Fungi Characteristics

Eukaryotic and primarily decomposers.
Lack chlorophyll and are mostly multicellular.
Non-motile and more closely related to animals than plants.
Lack true roots, leaves, and stems, absorbing nutrients post-digestion.
Not dependent on light for growth.

Kingdom Plantae Characteristics

Composed of multicellular, autotrophic eukaryotes.
Engage in photosynthesis and contain membrane-bound organelles.
Important food source for many organisms.
Most possess chlorophyll and grow by cell division.

Kingdom Protista Characteristics

Includes simple eukaryotic organisms.
Can be heterotrophic or autotrophic.
Primarily inhabit aquatic environments.
Movement facilitated by flagella or cilia.

Kingdom Archaea Characteristics

Consists of single-celled microorganisms.
Prokaryotic in nature.

Kingdom Bacteria Characteristics

Comprised of prokaryotic cells with cell walls that contain peptidoglycans.
Unicellular and can be either autotrophic or heterotrophic.

Description

Test your knowledge on the hierarchical classification of organisms based on evolutionary relationships. This quiz explores the reasons why classifications change and the levels within the biological classification system.