13a Flashcards
What is Earth called?
The Goldilocks Planet
What two phases did life develop over?
Chemical and Biological evolution
What is the order of geologic time?
Eon, Era, Period, Epoch
Places events in a sequence but does not identify their actual date of occurance
Relative time
Identifies the actual dates of geologic events
Absolute time
in undistributed sedimentary rocks the oldest rock layers are at the bottom and the youngest are at the top
Law of superdisposition
Oldest known fossils?
Stromatolites
Hypothesis suggests that periods of extreme glaciation confined life to the equatorial region or deep sea vents
Snowball earth
An assemblage of larger and more diverse soft-bodied organisms
Ediacaran biota
Species is still living. From an evolutionary perspective , all extant species are successful
Extant
Event about 65 mya wiped out three-quarters of plant and animal species on Earth
Cretaceous Paleogene extinction
The entire diversity of living organisms in an area and of the genetic variation contained withing species
Biodiversity
Prohibits trade and commerce of threatened and endangered species
CITES
Wave of speciation that occurs as a new habitat is colonized by a lineage, or in the wake of the extinction of another lineage
Adaptive radiation
Fish with wrist bones
Tiktaalik
Process of organizing and classifying organisms into certain groups by their differences is called..
Taxonomy
Who developed classification?
Carolus Linnaeus
Organisms classified from most general group,_____, down to the most specific,____.
Domain, Species
The evolutionary history of an organism, is the cornerstone of a branch of biology called systematic taxonomy
Phylogeny
as systematic taxonomy is commonly called, is the study of the evolution of biological diversity
Systematics
A family tree that shows a hypothesis about the evolutionary relationships thought to exist among groups of organisms
Phylogenetic tree
Occurs when two different species share a common ancestor, but have different characteristics from one another
Divergent evolution
Occurs when two different species do not share a common ancestor, but have developed similar characteristics through adaptation to similar environmental conditions
Convergent evolution
All developed from different original structures
Analogous structures
