Shared Flashcard Set

Details

Evolution lecture 21
Hedtke Vocab
18
Biology
Kindergarten
12/08/2010

Additional Biology Flashcards

 


 

Cards

Term
Primordial soup hypothesis
Definition
UV or lightning in a reducing (low O2) atmosphere created prebiotic molecules
Term
Panspermia hypothesis
Definition
Meteors brought extraterrestrial amino acids
Term
Ribozyme
Definition
RNA enzyme
Term
Autocatalytic
Definition
Enzymes that can catalyze their own replication
Term
Fossils
Definition
Any trace of past life.
Term
Trace fossils
Definition
footprints, body imprints, burrows, nests, etc.
Term
Chemical fossils
Definition
Remnants of chemicals that were formed by organisms (controversial evidence)
Term
Fossilization
Definition
Chemical substitution of hard parts by soluble materials by surrounding stone.
Term
How to fossilize
Definition
1. Bury in sediment, 2. Compact, 3. Wait
Term
Era
Definition
A period of geological time determined by strongly differentiated characteristic fossil taxa.
Term
Precambrian Era
Definition
4.6 bya - 543 mya. 1st organic molecules, cells, euks. Photosynthesis creates oxidizing atmosphere and allows for aerobic molecules, and multicellularity.
Term
Paleozoic Era
Definition
543 mya-251 mya. Began with "cambrian explosion" and almost all members of animal phyla arise during this era.
Term
Mesozoic Era
Definition
251mya - 65 mya. "Age of reptiles" dinosaurs, first mammals and flowering plants flourish. ends with mass extinction (climate change from meteor)
Term
Cenozoic Era
Definition
65 mya - present. "Age of Mammals" Diversification of mammals and pollinating insects
Term
phyletic gradualism
Definition
rate of change is almost constant, new species arise by gradual transformation.
Term
Punctuated Equilibrium
Definition
rate of chane occurs in bursts during speciation events, but is otherwise relatively stagnant.
Term
rate of evolution equation
Definition
(ln x2 - ln x1)/(t2-t1) in darwins, where time is in millions of years.
Term
darwins
Definition
unit of measurement of evolutionary change as a factor of e per million years.
Supporting users have an ad free experience!