24 terms

Cataloging Organisms

STUDY
PLAY

Terms in this set (...)

classification
how we classify an organism
systematics
categorizing by evolutionary relationship
taxonomy
naming
Binomial Nomenclature
Linneaus, Genus species based on latin
taxa
particular hierarchal group of species
does tissue or bone preserve well
bone
Process/ conditions of Fossilization (4)
1. have to not be eaten by scavengers
2. no breakdown, decomposition of the bones
3. covered by earth, no aerobic respiration
4. under pressure
Stratigraphy
order and relative position of strata and their relationship to the geological time scale.
time horizons
bands of strata give relative time
index fossil
fossil with known age used as a reference
Radiometric dating
assign age based on chemical substance bc substances want to be in stable form so they decay
half life
time that half of the atoms in the original isotope transform into the stable product
phylogeny
evolutionary history of a species or group of related species
Essentialism
basic comparison of essential characteristics
Evolutionary Classification
organisms sharing more characteristics are more related
analogous structure
derived characteristic formed in unrelated organisms that has similar structure, usually caused by similar environment
Phenetic Classification
attempt to reduce subjectivity, assign a number to characteristics and create proportions
phylogenetic tree
evolutionary history of group of organisms represented
cladistic classification
systematic focus on shared derived traits, branching
relative adaptation
relative to predecessor comparing too
monophyletic taxa
all share common ancestor
clade
basic unit of classification
synapomorphies
characteristics shared because evolved from recent ancestor
plesiomorphies
primitive traits inherited from an ancestor