11 Questions
What is the atmospheric gas that has substantially increased in concentration in the last 200 years?
Carbon dioxide
What is the significance of the Burgess Shales?
Contain diverse fossils of many multicellular organisms during the Cambrian Explosion
What led to the development of photosynthetic eukaryotes around 1.8 billion years ago?
Endosymbiosis between Cyanobacteria and eukaryotes
Which group of organisms is primarily responsible for oxygenation of our planet?
Cyanobacteria
What is depicted in the photograph taken by a former Biology 170 student in northwestern Montana?
Fossil stromatolites – layered communities of cyanobacteria
What percentage of all species on Earth are mammals?
0.005%
Which of the following statements about pathogenic microorganisms is correct?
Many diverse lineages of the domain Bacteria have pathogenic members.
What is special about the genome of Prochlorococcus?
It has a tiny genome for a free-living microbe.
Why is DNA a better information storage molecule than RNA?
DNA is more stable than RNA.
What function do gut microbes perform for their host?
They break down organic carbon that we cannot digest.
What is the genomic material of Influenza viruses stored as?
Single-stranded RNA
Test your knowledge of Earth's history, atmosphere, and fossil records. Answer questions about mass extinction events, atmospheric gases, and the significance of the Burgess Shales.
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