Transcript First Life on Earth

First Life on Earth
Elsie, Candy, Karen, Cindy
First Life Appeared on Earth...
 3.7 billion years ago
 Prokaryotic cells, bacteria
 Evidence from fossilized mats of cyanobacteria
called Stromatolites in Greenland
Prokaryotic cell?
 Single- celled organism without distinct nucleus- no internal
membrane
 Most primitive form of life
 Carry protein
 BACTERIA
 -Biological complex
 -Have cell walls protecting protein-producing DNA
Even earlier...
 Hints of life in even more primeval rocks
 4.1 billion years old zircon from Western Australia
 Contain high amounts of carbon
 Used in biological processes
The First Human on Earth
 All People today are classified as Homo sapiens
 Our species of human first began to evolve nearly 200,000 years ago
 Human evolved from Neandertals which have similar body features
Define Human
 200,000 years ago, human evolved
from Neandertals, which is a part of the
homo sapiens family
 Humans and Neandertals all belongs to
the homo sapiens family
 Humans develop special body characteristics
over the last 6 million years to fit in with the
environment
Works Cited
BBC. "History of Life on Earth." BBC Nature. N.p., n.d. Web. 15 Nov. 2016.
<http://www.bbc.co.uk/nature/history_of_the_earth>
"CELLS: ORIGINS." CELLS: ORIGINS. N.p., n.d. Web. 15 Nov. 2016.
<https://www2.estrellamountain.edu/faculty/farabee/biobk/BioBookCELL1.html>.
"prokaryote". Encyclopædia Britannica. Encyclopædia Britannica Online.
Encyclopædia Britannica Inc., 2016. Web. 14 Nov. 2016
<https://global.britannica.com/science/prokaryote>.
Smithsonian's National Museum of Natural History. “Human Characteristics: What Does It Mean to Be Human | The
Smithsonian Institution's Human Origins Program.” Human Characteristics: What Does It Mean to Be Human | The
Smithsonian Institution's Human Origins Program, 1 Mar. 2010, humanorigins.si.edu/human-characteristics.
<http://humanorigins.si.edu/human-characteristics>
Than, Ker. "How Did Life Arise on Earth?" Live Science. N.p., 1 Sept. 2016. Web. 14 Nov. 2016.
<http://www.livescience.com/1804-greatest-mysteries-life-arise-earth.html>