BIO 200 Exam 3 Questions with
Complete Solutions
Which of the following is NOT a necessary condition of natural selection?
a. A trait must be heritable
b. A trait must contribute to greater survivorship
c. A trait must be variable
d. A trait must contribute to greater reproductive output
e. All of the above are necessary for natural selection to occur - ANSWER-b. A trait
must contribute to greater survivorship
Organisms that live in very hostile habitats (extremophiles) likely belong to which
group?
a. Archaea
b. Protista
c. Fungi
d. Bacteria
e. Protista - ANSWER-a. Archaea
Which of the following processes is more pronounced in small populations than large
populations?
a. Gene flow
b. Allopatric speciation
c. Adaptive radiation
d. Genetic drift
e. Directional selection - ANSWER-d. Genetic drift
Which of the following organisms contain plasmids?
a. Plants
b. Fungi
c. Nematodes
d. Flatworms
e. Bacteria - ANSWER-e. Bacteria
Evolution that occurs over geologic time would best be described as:
a. Macroevolution
b. Microevolution
c. Homeotic evolution
d. Natural evolution
e. Allopatric evolution - ANSWER-a. Macroevolution
The similarity in limb morphology among the tetrapods exists because tetrapods are
descended from:
a. Cartilaginous fish
, b. Hagfish
c. Lobe-finned fish
d. Lancelets
e. Ray-finned fish - ANSWER-c. Lobe-finned fish
The largest organism on earth belongs to which of the following groups?
a. Fungi
b. Plantae
c. Mammalia
d. Reptilia
e. Ray-finned fish - ANSWER-a. Fungi
Why are so many instances of MRSA (multiply-resistant Staphylococcus aureus)
associated with farms?
a. Staph infects animals only
b. Farms use heavy doses of antibiotics
c. Farm animals produce nitrogenous waste
d. Bacteria on farms fix nitrogen from the atmosphere
e. Farms use no antibiotics - ANSWER-b. Farms use heavy doses of antibiotics
Which of the following metabolic modes is exhibited by animals?
a. Chemoautotrophy
b. Chemoheterotrophy
c. Photoautotrophy
d. Photoheterotrophy
e. All of the above - ANSWER-b. Chemoheterotrophy
Which of the following plants lacks vascular tissue?
a. Ferns
b. Pine tree
c. Rose bush
d. Cherry tree
e. Moss - ANSWER-e. Moss
All of the following are prezygotic isolating mechanisms EXCEPT:
a. Temporal isolation
b. Mechanical isolation
c. Behavioral isolation
d. Gametic isolation
e. Moss - ANSWER-e. Moss
The filaments that make up a fungus' body are called:
a. Spores
b. Hyphae
c. Mycorrhizae
d. Lichens
e. Plasmids - ANSWER-b. Hyphae
In plants, what does the ovule become?
a. Egg
Complete Solutions
Which of the following is NOT a necessary condition of natural selection?
a. A trait must be heritable
b. A trait must contribute to greater survivorship
c. A trait must be variable
d. A trait must contribute to greater reproductive output
e. All of the above are necessary for natural selection to occur - ANSWER-b. A trait
must contribute to greater survivorship
Organisms that live in very hostile habitats (extremophiles) likely belong to which
group?
a. Archaea
b. Protista
c. Fungi
d. Bacteria
e. Protista - ANSWER-a. Archaea
Which of the following processes is more pronounced in small populations than large
populations?
a. Gene flow
b. Allopatric speciation
c. Adaptive radiation
d. Genetic drift
e. Directional selection - ANSWER-d. Genetic drift
Which of the following organisms contain plasmids?
a. Plants
b. Fungi
c. Nematodes
d. Flatworms
e. Bacteria - ANSWER-e. Bacteria
Evolution that occurs over geologic time would best be described as:
a. Macroevolution
b. Microevolution
c. Homeotic evolution
d. Natural evolution
e. Allopatric evolution - ANSWER-a. Macroevolution
The similarity in limb morphology among the tetrapods exists because tetrapods are
descended from:
a. Cartilaginous fish
, b. Hagfish
c. Lobe-finned fish
d. Lancelets
e. Ray-finned fish - ANSWER-c. Lobe-finned fish
The largest organism on earth belongs to which of the following groups?
a. Fungi
b. Plantae
c. Mammalia
d. Reptilia
e. Ray-finned fish - ANSWER-a. Fungi
Why are so many instances of MRSA (multiply-resistant Staphylococcus aureus)
associated with farms?
a. Staph infects animals only
b. Farms use heavy doses of antibiotics
c. Farm animals produce nitrogenous waste
d. Bacteria on farms fix nitrogen from the atmosphere
e. Farms use no antibiotics - ANSWER-b. Farms use heavy doses of antibiotics
Which of the following metabolic modes is exhibited by animals?
a. Chemoautotrophy
b. Chemoheterotrophy
c. Photoautotrophy
d. Photoheterotrophy
e. All of the above - ANSWER-b. Chemoheterotrophy
Which of the following plants lacks vascular tissue?
a. Ferns
b. Pine tree
c. Rose bush
d. Cherry tree
e. Moss - ANSWER-e. Moss
All of the following are prezygotic isolating mechanisms EXCEPT:
a. Temporal isolation
b. Mechanical isolation
c. Behavioral isolation
d. Gametic isolation
e. Moss - ANSWER-e. Moss
The filaments that make up a fungus' body are called:
a. Spores
b. Hyphae
c. Mycorrhizae
d. Lichens
e. Plasmids - ANSWER-b. Hyphae
In plants, what does the ovule become?
a. Egg
