1.11: Scientific evidence from many different disciplines ... · Prokaryotic Cell:...

N7.12 EVIDENCE FOR THE ORIGIN OF LIFE

1.11: Sc ient i f ic evidence from many di f ferent d isc ipl ines supports models of the or ig in of l i fe .

UNIT 7: POD 4 ORIGIN OF LIFE

UNIT 7: POD 4 ORIGIN OF LIFE

GeologyRadioisotope Dating:

Allows estimates of events during evolutionary history.

UNIT 7: POD 4 ORIGIN OF LIFE

~65 – 70 mya

UNIT 7: POD 4 ORIGIN OF LIFE

Ex. Banded Iron Formations

UNIT 7: POD 4 ORIGIN OF LIFE

Ex. Fossil Fuels

UNIT 7: POD 4 ORIGIN OF LIFE

Miller-Urey Experiments

Simulated “Early Earth” conditions (no O2).

Created Simple Biological Molecules

UNIT 7: POD 4 ORIGIN OF LIFE

Commonalities among all organisms suggests common ancestry.

It is the simplest explanation for the evidence.

DNA Stores Information in all cells on Earth.

UNIT 7: POD 4 ORIGIN OF LIFE

UNIT 7: POD 4 ORIGIN OF LIFE

The Genetic Code is universal in all cells

Glycolysis is universal in all cells

UNIT 7: POD 4 ORIGIN OF LIFE

UNIT 7: POD 4 ORIGIN OF LIFE

All life is organized into cellsThese cells contain fundamental structural similarities

Note: Not to scale.

Prokaryotic Cell:

“Plant-like” eukaryotic cell:“Animal-like” eukaryotic cell:

A Universal Phylogenetic

Tree

UNIT 7: POD 4 ORIGIN OF LIFE