View
216
Download
2
Tags:
Embed Size (px)
Citation preview
It’s a microbial world
(And was and will be to the end)
3 Domains of life
•~4-6 x 1030 cells
•~350-550 Pg of C (1 Pg = 1015 g)
•~60% of all biomass
History of Earth
http://web.mit.edu/12a34/www/home.html
Indications of eukaryotic life
Current debate
Seawater
Ice bacteria
Ice images: Priscu research group, MSU
Soil bacteria
Hydrothermal vents
http://www.cascadia.ctc.edu/facultyweb/instructors/jvanleer/
Subsurface biosphere
Space?
http://www.astronomie.de/vds/astronomietag-2003/alh84001.jpg
Allen Hills Meteorite
http://www-curator.jsc.nasa.gov/antmet/marsmets/alh84001/images/ALH84001,0-saw.jpg
What life is made of
http://micro.magnet.fsu.edu/cells/procaryotes/images/procaryote.jpg
CHNOPSUsed to make:
•Lipids
•Proteins
•RNA
•DNA