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Biology Lab 3
Taxonomy & Systematics
25
Biology
Undergraduate 1
09/12/2012

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Term

Carl von Linnè

(1707-78)

Definition

Created the modern system of scientific nomenclature featuring binomials

 

"Two-part names"

-Genus/epithet-

Term
Taxonomy
Definition

Science of classifying and naming organisms.

 

 

Term
Taxon
Definition
Unit of classification for genuses.
Term
Populations
Definition
Members of the same species isolated geographically into smaller groups. 
Term
Cline
Definition
A population in a different geographic range that develops slight variations or gradations in some specific characteristics. 
Term
Robert Whittaker
Definition
Proposed five kingdom system
Term
Five Kingdoms
Definition

Monera

Protista

Fungi

Plantae

Animalia

Term
Kingdom Monera
Definition

All prokaryotic organisms

 

Separated into 3 supergroups by Carl Woese

 

domain Eukarya

domain Archaea

domain Bacteria

 

Term
Kingdom Protista
Definition
Eukaryotic, single-celled or simple, multicellular organisms
Term
Kingdom Fungi
Definition
Eukaryotic, uni- or multicellular, heterotrophic, food absorbers
Term
Kingdom Plantae
Definition
Eukaryotic, multi-cellular, autotrophic, photosynthesizers
Term
Kingdom Animalia
Definition
Eukaryotic, multi-cellular, heterotrophic consumers
Term
Sister Species
Definition
2 species that share a common ancestor and were each other's closest relatives
Term
Phylogeny
Definition

Any organism's unique evolutionary history

 

Often illustrated as phylogenetic trees.

Term
Phylogenetic systematics
Definition
Willi Henning's proposal that systematics should reflect the known evolutionary history of organisms 
Term
Monophyletic
Definition
An ancestral species and all of its descendents.
Term
Polyphyletic group
Definition
Includes species from different evolutionary lines
Term
Paraphyletic
Definition
A common ancestor is included but not all of its descendents.
Term
Morphology
Definition
The comparing of physical appearances of organisms
Term
Convergence
Definition

Specie come to resemble each other because they face similar environmental demands.

 

 

Term
Convergent Evolution
Definition

Organisms said to resemble eachother but the origin of the resemblance is caused by different ancestory 

 

*Wings of a butterfly vs. wings of a bird*

Term
Analogous
Definition
Features look and function similarly but  come from different evolutional origins
Term
Homologous
Definition
Look and function of a feature appear similar and result from the same common ancestry
Term
Synapomorphies
Definition
Shared derived traits that are common to 2 or more taxa
Term
Principle of Maximum Parsimony
Definition
Choosing the simplest cladogram, requiring the fewest number of assumptions about evolutionary events.
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