Biology Praxis EXAM STUDY GUIDE
2026/2027 COMPLETE QUESTIONS WITH
VERIFIED CORRECT ANSWERS || 100%
GUARANTEED PASS <NEWEST VERSION
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
Jean-Baptiste Denis - ANSWER 1667 French physician transfused patient blood
with calf blood to attempt to calm fits of rage.
biology - ANSWER the study of life
characteristics common to living organisms (life functions) - ANSWER 1. cellular
structure and function
, 2. reproduction
3. metabolism
4. homeostasis
5. heredity
6. evolution
7. interdependence
cells - ANSWER highly organized, tiny structures with thin coverings of
membranes. The smallest unit capable of all life functions.
reproduction - ANSWER the process by which organisms make more of their own
kind from one generation to the next.
Metabolism - ANSWER The sum of all chemical reactions carried out in an
organism.
Homeostasis - ANSWER The maintenance of stable internal conditions in spite of
changes in the external environment.
Genes - ANSWER Sets of inherited instructions for making proteins. They control
when proteins are made and what proteins are made.
Heredity - ANSWER The passing of traits from parents to offspring.
Mutation - ANSWER A change to the DNA of a gene.
Evolution - ANSWER Change in inherited traits in a species over time.
2026/2027 COMPLETE QUESTIONS WITH
VERIFIED CORRECT ANSWERS || 100%
GUARANTEED PASS <NEWEST VERSION
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
Jean-Baptiste Denis - ANSWER 1667 French physician transfused patient blood
with calf blood to attempt to calm fits of rage.
biology - ANSWER the study of life
characteristics common to living organisms (life functions) - ANSWER 1. cellular
structure and function
, 2. reproduction
3. metabolism
4. homeostasis
5. heredity
6. evolution
7. interdependence
cells - ANSWER highly organized, tiny structures with thin coverings of
membranes. The smallest unit capable of all life functions.
reproduction - ANSWER the process by which organisms make more of their own
kind from one generation to the next.
Metabolism - ANSWER The sum of all chemical reactions carried out in an
organism.
Homeostasis - ANSWER The maintenance of stable internal conditions in spite of
changes in the external environment.
Genes - ANSWER Sets of inherited instructions for making proteins. They control
when proteins are made and what proteins are made.
Heredity - ANSWER The passing of traits from parents to offspring.
Mutation - ANSWER A change to the DNA of a gene.
Evolution - ANSWER Change in inherited traits in a species over time.
