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biological classification

Taxonomy: Life’s Filing System
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Taxonomy: Life’s Filing System

Taxonomy is the system of naming and determining relationships between organisms that helps bring order to life.

Carl Linnaeus classified organisms based on structural similarities and gave each species a two-part scientific name. The naming system still stands, but species are now often grouped by derived characteristics based on common ancestry, in a system known as cladistics.

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Biological Classification and Binomial Nomenclature

Biological Classification and Binomial Nomenclature

We all have a scientific name: Homo sapiens. An example of binomial nomenclature, this name contains a genus (Homo) and a species (sapiens). Find out more about this naming system. More...

Article
Science Prof Online
Classification of Living Things

Classification of Living Things

The widest group in biological classification used to be the kingdom. Now, an even broader group — domain — has been added. How do they all fit together? More...

Article
National Earth Science Teachers Association
Practice Quiz for Introduction to Classification of Living Things

Practice Quiz for Introduction to Classification of Living Things

Take a quiz, but don’t sweat the outcome. Instant feedback on each question tells you if you’re on the right track. If you aren't, try again and be a winner! More...

Interactive
Palomar College
Biomimicry Taxonomy: Biology Organized by Challenge

Biomimicry Taxonomy: Biology Organized by Challenge

Here’s a novel system that classifies organisms and natural systems by their functions. Use its framework to ask questions of nature to begin your design challenge. More...

Article
Biomimicry 3.8 Institute
Classifying Life

Classifying Life

Biological classification is changing along with advances in genetics. Launch this interaction to see if you can sort these organisms based on their pictures and descriptions. More...

Interactive
NOVA/PBS
Interview with Professor L. Lacey Knowles

Interview with Professor L. Lacey Knowles

The use of genetics has revolutionized classification. Professor Knowles of the University of Michigan explains why her research has rocked the field of species identification and taxonomy. More...

Profile
Science Watch
Phylogenetic Trees

Phylogenetic Trees

Naming an organism is only one component of biological classification. The other is figuring where it fits in the scheme of living things. Explore the differences been phylogenetic trees and cladograms. More...

Video
McGraw-Hill
Probing question: What Is a Molecular Clock?

Probing question: What Is a Molecular Clock?

As DNA copies itself, random errors build up at a steady rate. So, by comparing the DNA of different species, scientists can tell how long ago they shared a common ancestor. More...

Article
Phys.org

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