Biology 170 Spring 2024 Test 1

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What has substantially increased in concentration in the last 200 years?

Oxygen

Carbon dioxide (correct)

Nitrogen

Argon

What are the Burgess Shales significant for?

They contain fossils of the first primates.

They contain diverse fossils of many multicellular organisms during the Cambrian Explosion (correct)

They are a rich source of oil and gas

They capture the Great Oxygenation Event

What event led to the formation of photosynthetic eukaryotes?

Endosymbiotic event between Cyanobacteria and eukaryotes (correct)

Endosymbiotic event between Eukaryotes and Archaea

Endosymbiotic event between Alphaproteobacteria and Archaea

Endosymbiotic event between Cyanobacteria and alphaproteobacteria

What is the primary cause of mass extinction events?

All of the above Signup and view all the answers

Which group of organisms is primarily responsible for oxygenation of our planet?

Cyanobacteria Signup and view all the answers

What is the significance of the Cambrian Explosion?

It is a period of rapid diversification of multicellular life Signup and view all the answers

What does the photograph show, according to the text?

All of the above Signup and view all the answers

What is a characteristic of most life on Earth?

It is microscopic Signup and view all the answers

What is a unique feature of the cyanobacterium Prochlorococcus?

It is one of the smallest photosynthetic organisms on Earth Signup and view all the answers

How do Influenza viruses store their genetic material?

Single-stranded RNA Signup and view all the answers

Why are Influenza viruses so dangerous?

They can jump between many different hosts and have genetic reassortment Signup and view all the answers

What is a characteristic of microbes?

They live on virtually every place on Earth Signup and view all the answers

What are the two proteins responsible for an Influenza virus entering a host cell?

Hemagglutinin and Neuraminidase Signup and view all the answers

What percentage of all species on Earth are mammals?

1% Signup and view all the answers

What is the main reason why DNA is a better information storage molecule than RNA?

DNA is more stable than RNA Signup and view all the answers

What is one function of gut microbes?

They manufacture vitamins that we are unable to make Signup and view all the answers

What is true about pathogenic microorganisms?

Many diverse lineages of the domain Bacteria have pathogenic members Signup and view all the answers

What is the term used for the independent evolution of similar traits?

Convergent evolution Signup and view all the answers

What is the source of energy for the bacterium Thermocrinis ruber?

Hydrogen gas (H2) Signup and view all the answers

What is the role of oxygen in the energy metabolism of Thermocrinis ruber?

It is used as a reactant Signup and view all the answers

What is the source of energy for the bacterium Desulfotomaculum?

Benzene (a component of gasoline) Signup and view all the answers

What is the role of sulfate in the energy metabolism of Desulfotomaculum?

It is used as a reactant Signup and view all the answers

What is a characteristic of phototrophs?

They use different kinds of chlorophylls Signup and view all the answers

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 Signup and view all the answers

Based on the phylogeny, what is the classification of reptiles (Reptilia)?

Monophyletic Signup and view all the answers

What is the classification of the 'endotherms' group (Mammalia and Aves)?

Monophyletic Signup and view all the answers

Which process involves the acquisition of new DNA by an organism from a donor?

Horizontal gene transfer Signup and view all the answers

What is true about viruses?

Viruses greatly outnumber cellular organisms Signup and view all the answers

What is the term for an RNA that can catalyze a chemical reaction?

Ribozyme Signup and view all the answers

What is true about autotrophs?

All autotrophs are phototrophs Signup and view all the answers