5236 Biology Praxis Exam 1
The transfer of pollen from one flower to another while a bee is collecting nectar is an
example of which of the following relationships?
(A) Commensalism
(B) Mutualism
(C) Competition
(D) Parasitism - answer(B) Mutualism
Taxonomic classification of two different organisms as members of the same order
indicates that they are also members of the same
(A) family
(B) genus
(C) phylum
(D) species - answer(C) phylum
Which of the following changes typically occurs in a eukaryotic cell as it progresses
through the S phase of the cell cycle?
(A) The nuclear membrane breaks down.
(B) The quantity of DNA in the cell doubles.
(C) The cell membrane pinches inward to form a cleavage furrow.
(D) The duplicated chromosomes line up along the equatorial plate. - answer(B) The
quantity of DNA in the cell doubles.
Which TWO of the following characteristics are shared by members of the kingdom
Fungi?
(A) Can perform photosynthesis
(B) Have cell walls that contain chitin
(C) Secrete digestive enzymes into the surrounding environment
(D) Have circular chromosomes that are unprotected by a nuclear membrane -
answer(B) Have cell walls that contain chitin
(C) Secrete digestive enzymes into the surrounding environment
The population of a particular mammalian species has dwindled to less than 1,000
individuals. Which of the following is most likely to cause the population to become
extinct?
(A) Absence of interspecific competition
, (B) Increased gene flow
(C) Presence of disruptive selection
(D) Decreased genetic diversity - answer(D) Decreased genetic diversity
Which of the following visual aids will best support an investigation of energy flow
through the organisms in a particular ecosystem?
(A) A cladogram
(B) A Punnett square
(C) A diagram of a food web
(D) A topographic map - answer(C) A diagram of a food web
Which of the following is a technique used to determine the three-dimensional structure
of a protein at high resolution?
(A) Flow cytometry
(B) Immunoprecipitation
(C) Polyacrylamide gel electrophoresis
(D) X-ray crystallography - answer(D) X-ray crystallography
Which of the following terms refers to the collective evidence that links the origin of
some eukaryotic organelles to prokaryotes?
(A) Hybrid inviability
(B) Heterozygote advantage
(C) The endosymbiotic theory
(D) The germ theory of disease - answer(C) The endosymbiotic theory
A segmented body is a key characteristic of the members of which of the following
animal phyla?
(A) Annelida
(B) Cnidaria
(C) Nematoda
(D) Porifera - answer(A) Annelida
A teacher asks students to identify a type of organism that reproduces primarily through
asexual reproduction. Which of the following is the most accurate response?
(A) A whale
(B) A shark
(C) A maple tree
(D) A bacterium - answer(D) A bacterium
Students spread bacteria on several slabs of solid culture medium. Some of the slabs
were prepared from a culture medium that contained glucose, whereas the remaining
The transfer of pollen from one flower to another while a bee is collecting nectar is an
example of which of the following relationships?
(A) Commensalism
(B) Mutualism
(C) Competition
(D) Parasitism - answer(B) Mutualism
Taxonomic classification of two different organisms as members of the same order
indicates that they are also members of the same
(A) family
(B) genus
(C) phylum
(D) species - answer(C) phylum
Which of the following changes typically occurs in a eukaryotic cell as it progresses
through the S phase of the cell cycle?
(A) The nuclear membrane breaks down.
(B) The quantity of DNA in the cell doubles.
(C) The cell membrane pinches inward to form a cleavage furrow.
(D) The duplicated chromosomes line up along the equatorial plate. - answer(B) The
quantity of DNA in the cell doubles.
Which TWO of the following characteristics are shared by members of the kingdom
Fungi?
(A) Can perform photosynthesis
(B) Have cell walls that contain chitin
(C) Secrete digestive enzymes into the surrounding environment
(D) Have circular chromosomes that are unprotected by a nuclear membrane -
answer(B) Have cell walls that contain chitin
(C) Secrete digestive enzymes into the surrounding environment
The population of a particular mammalian species has dwindled to less than 1,000
individuals. Which of the following is most likely to cause the population to become
extinct?
(A) Absence of interspecific competition
, (B) Increased gene flow
(C) Presence of disruptive selection
(D) Decreased genetic diversity - answer(D) Decreased genetic diversity
Which of the following visual aids will best support an investigation of energy flow
through the organisms in a particular ecosystem?
(A) A cladogram
(B) A Punnett square
(C) A diagram of a food web
(D) A topographic map - answer(C) A diagram of a food web
Which of the following is a technique used to determine the three-dimensional structure
of a protein at high resolution?
(A) Flow cytometry
(B) Immunoprecipitation
(C) Polyacrylamide gel electrophoresis
(D) X-ray crystallography - answer(D) X-ray crystallography
Which of the following terms refers to the collective evidence that links the origin of
some eukaryotic organelles to prokaryotes?
(A) Hybrid inviability
(B) Heterozygote advantage
(C) The endosymbiotic theory
(D) The germ theory of disease - answer(C) The endosymbiotic theory
A segmented body is a key characteristic of the members of which of the following
animal phyla?
(A) Annelida
(B) Cnidaria
(C) Nematoda
(D) Porifera - answer(A) Annelida
A teacher asks students to identify a type of organism that reproduces primarily through
asexual reproduction. Which of the following is the most accurate response?
(A) A whale
(B) A shark
(C) A maple tree
(D) A bacterium - answer(D) A bacterium
Students spread bacteria on several slabs of solid culture medium. Some of the slabs
were prepared from a culture medium that contained glucose, whereas the remaining
