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If you open a can of chicken noodle soup and immediately examine it microscopically, you will find no microoganisms. If you let the open can sit on the shelf for a few weeks and then examine it, you will find lots of microorganisms. The origin of these microorganisms is most likely:

Airborne microorganisms

Intestinal bacteria are necessary for plant-eating animals to digest:


Which of the following groups contains the smallest living organisms?


When you eat mushrooms on your pizza, you are technically eating the:


Red Tides are caused by:


If an individual was bitten by a tick and develops a Bull's eye rash, which organism could be causing these symptoms?

Borrelia burgodorferi

Paralytic shellfish poisoning occurs when ________ are eaten by humans or marine mammals.


The endosymbiotic hypothesis accounts for the origin of which cell structure?


What is the second of the two names in an organism's scientific name?


A zygosporangium is produced by:

the union of two haploid hyphae.

Which of the following bacteria/ disease pairs does NOT match?

Borrelia burgodorferi, Diphtheria

Bacteria are useful in all of the following ways, EXCEPT:

They transfer plasmids containing antibiotic resistance genes

What is so significant about the evolution of photosynthesis on Earth?

It allowed aerobic, multicellular organism to evolve.

The body of a fungus is generally composed of:


Most scientists attribute the mass extinction of the dinosaurs to:

Meteorite impact.

Mobile prokaryotes can move around with the help of:


All of the following are ways in which anthrax can be contracted, EXCEPT:

Mosquito Bites

RNA molecules that function as enzymes:

are called ribozymes.

Fungal cell walls are different from plant cell walls because fungal walls contain:

chitin, while plant walls have cellulose

Which of the following represents an appropriate scientific name for a human?

Homo sapiens (in all italics)

Dental plaque is an example of:

A biofilm

The importance of fungi to ecosystems is mostly as a(n):


An organism that decays dead organic matter is called a(n) ____________.


Kelp and seaweed are types of:

Brown algae

Based on current knowledge about the conditions of the early Earth, the first organisms were most likely:

Anaerobic prokaryotes.

Which of the following is FALSE about the Endosymbiont theory?

It states that an anaerobic predatory cell engulfed an aerobic bacterium which evolved into a chloroplast

The Miller-Urey experiment showed that:

it is possible to create simple biomolecules such as sugars and amino acids by reacting ammonia, water vapor, methane, and hydrogen gas in a chamber filled with electric sparks

Which of the following has no organelles, ribosomes, or cytoplasm?

A virus

Molds easily contaminate foods because fungi:

produce huge numbers of highly mobile, airborne spores.

Who was the Swedish naturalist who established the modern binomial system for classifying organisms?


Which of the following is NOT a Staph infection?

Necrotizing fasciitis

Which of the following about HIV is FALSE?

it is spread in the same way in which the Polio virus is spread

The scenario of chemical evolution leading to the origin of life on Earth is plausible because:

there was a vast period of time for simple chemicals to evolve into complex cells.

Which branch of biology attempts to reconstruct evolutionary history?


Theories on the atmosphere of early Earth indicate that it lacked:


The first multicellular terrestrial organisms were


Which of the following has pseudopods?


Bacterial endospores are used for:

keeping the bacteria alive under harsh conditions

Which of the following can be a bacterial shape?

All of the above

Which of the following is the smallest or least inclusive group?


Bacterial cell walls contain:


Which of the following statements is FALSE:

yeasts are single-celled protists

An organism with a nucleus would be placed in which domain?


Upon entering a cell, a DNA virus:

B and C only

When a zygosporangium germinates, it must undergo ________ before forming a stalked sporangium.


Club fungi produce diploid reproductive structures called:


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