30 Questions
What has substantially increased in concentration in the last 200 years?
Carbon dioxide
What are the Burgess Shales significant for?
They contain diverse fossils of many multicellular organisms during the Cambrian Explosion
What event led to the formation of photosynthetic eukaryotes?
Endosymbiotic event between Cyanobacteria and eukaryotes
What is the primary cause of mass extinction events?
All of the above
Which group of organisms is primarily responsible for oxygenation of our planet?
Cyanobacteria
What is the significance of the Cambrian Explosion?
It is a period of rapid diversification of multicellular life
What does the photograph show, according to the text?
All of the above
What is a characteristic of most life on Earth?
It is microscopic
What is a unique feature of the cyanobacterium Prochlorococcus?
It is one of the smallest photosynthetic organisms on Earth
How do Influenza viruses store their genetic material?
Single-stranded RNA
Why are Influenza viruses so dangerous?
They can jump between many different hosts and have genetic reassortment
What is a characteristic of microbes?
They live on virtually every place on Earth
What are the two proteins responsible for an Influenza virus entering a host cell?
Hemagglutinin and Neuraminidase
What percentage of all species on Earth are mammals?
1%
What is the main reason why DNA is a better information storage molecule than RNA?
DNA is more stable than RNA
What is one function of gut microbes?
They manufacture vitamins that we are unable to make
What is true about pathogenic microorganisms?
Many diverse lineages of the domain Bacteria have pathogenic members
What is the term used for the independent evolution of similar traits?
Convergent evolution
What is the source of energy for the bacterium Thermocrinis ruber?
Hydrogen gas (H2)
What is the role of oxygen in the energy metabolism of Thermocrinis ruber?
It is used as a reactant
What is the source of energy for the bacterium Desulfotomaculum?
Benzene (a component of gasoline)
What is the role of sulfate in the energy metabolism of Desulfotomaculum?
It is used as a reactant
What is a characteristic of phototrophs?
They use different kinds of chlorophylls
What is a characteristic of life at near boiling temperatures in Yellowstone National Park?
The communities contain a small number of different kinds of bacteria
Based on the phylogeny, what is the classification of reptiles (Reptilia)?
Monophyletic
What is the classification of the 'endotherms' group (Mammalia and Aves)?
Monophyletic
Which process involves the acquisition of new DNA by an organism from a donor?
Horizontal gene transfer
What is true about viruses?
Viruses greatly outnumber cellular organisms
What is the term for an RNA that can catalyze a chemical reaction?
Ribozyme
What is true about autotrophs?
All autotrophs are phototrophs
This quiz assesses knowledge on biology concepts, focusing on atmospheric gases and their changes over time. It's a comprehensive test for Biology 170 students, covering key topics and principles. Prepare to answer questions on various biology subjects, including environmental changes and atmospheric composition.
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