PRAXIS
Which of the following terms indicates the ecological role that an organism plays in a
community?
A. Biome
B. Niche
C. Ecotone
D. Territory - answer Niche
Which of the following characteristics distinguishes members of the domain Eukarya
from members of the domains Archaea and Bacteria?
A. The ability to perform photosynthesis
B. The ability to replicate chromosomes
C. The presence of RNA polymerase
D. The presence of a nuclear envelope - answerThe presence of a nuclear envelope
Valine is typically classified as a hydrophobic amino acid because a valine molecule has
which of the following types of side chains?
A. Polar and neutral
B. Nonpolar
C. Positively charged
D. Negatively charged - answerNonpolar
A teacher asks students to describe how the data collected in an experiment are
typically used as evidence. Which of the following responses is the most accurate?
A. "The data are used to confirm an existing belief."
B. "The data are used as facts that cannot be questioned or criticized."
C. "The data are used to support or reject a hypothesis."
D. "The data are used to make a theory into a law." - answer"The data are used to
support or reject a hypothesis."
Which of the following biomes is characterized by long winters and short summers snow
as the predominant form of precipitation soil that is acidic and poor in nutrients and
wooded areas made up mostly of evergreen trees with needlelike leaves?
A. Savanna
B. Boreal forest
C. Hot and dry desert
D. Tropical rain forest - answerBoreal forest
One strand of a certain segment of DNA has the following nucleotide sequence.
5' - A G A T G T C C A G T A - 3'
The complementary strand in the same segment of DNA most likely has which of the
following nucleotide sequences?
,A. 3' - T C T A C A G G T C A T - 5'
B. 3' - C T C G T G A A C T G C - 5'
C. 3' - G A G C A C T T G A C G - 5'
D. 3' - A G A T G T C C A G T A - 5' - answer
The overall process of aerobic cellular respiration is best described as the oxidation of
glucose to produce carbon dioxide and the reduction of oxygen to produce which of the
following?
A. ADP
B. NADH
C. Sucrose
D. Water - answerWater
A student uses stationary fans to investigate the effect of wind on water loss by plants.
The student divides the plants into three treatment groups and places each group in
front of a fan. The student sets the fan for each group to one of three different levels:
low medium or high. After 24 hours the student determines the amount of water that
was lost by each plant. To create a bar graph of the results the student should make the
height of each bar represent which of the following?
A. The fan speed for each treatment group
B. The number of plants in each treatment group
C. The average water loss for each treatment group
D. The duration of wind exposure for each treatment group - answerThe average water
loss for each treatment group
Interphase is the part of the cell cycle that includes which of the following?
A. Cytokinesis
B. Synapsis of homologous chromosomes
C. Replication of DNA
D. Condensation of chromosomes - answerReplication of DNA
A model of secondary succession typically includes which of the following?
A. The arrival of pioneer species
B. Changes in species composition over time
C. A community structure that remains stable over time
D. The addition of rock to Earth's surface as a result of a volcanic eruption -
answerChanges in species composition over time
Which TWO of the following are typically present in a bacterial cell but not in a virus?
A. Ribosomes
B. DNA replication machinery
C. A genome
D. Reverse transcriptase - answerRibosomes and DNA replication machinery
Wind turbines are used for which of the following activities?
, A. Maintaining a breeze over crops growing in an arid environment without using a lot of
farm machinery
B. Generating electricity without burning fossil fuels
C. Pumping natural gas without injecting chemicals into groundwater
D. Circulating water and nutrients in some seas without installing ocean floor pumps -
answergenerating electricity without burning fossil fuels
The nucleotides of a single strand of DNA are linked together by which of the following?
A. Ionic bonds
B. Peptide bonds
C. Hydrogen bonds
D. Phosphodiester bonds - answerPhosphodiester bonds
Which of the following pathways is common to both fermentation and aerobic cellular
respiration?
A. Glycolysis
B. Electron transport chain
C. Photophosphorylation
D. Citric acid cycle - answerGlycolysis
In a germinating seedling the root grows downward into the soil. Which of the following
correctly explains this phenomenon?
A. The root exhibits positive gravitropism.
B. The root exhibits positive phototropism.
C. The root cells respond to water in the soil.
D. The root cells need light for photosynthesis - answerThe root exhibits positive
gravitropism.
Which of the following best describes the role of transpiration in the water cycle?
A. It moves water from lakes and ponds to the oceans.
B. It moves water from the soil to the atmosphere.
C. It moves water from the atmosphere to the soil.
D. It moves water from Earth's surface to aquifers located below Earth's surface -
answerIt moves water from the soil to the atmosphere.
In which of the following cell types is a mutation most likely to have an impact on the
gene pool of a population?
A. Liver
B. Neuron
C. Skin
D. Sperm - answerSperm
Which of the following actions will best help maintain the diversity and abundance of
organisms in a terrestrial ecosystem?
A. Introducing a new exotic species
B. Preventing habitat destruction
Which of the following terms indicates the ecological role that an organism plays in a
community?
A. Biome
B. Niche
C. Ecotone
D. Territory - answer Niche
Which of the following characteristics distinguishes members of the domain Eukarya
from members of the domains Archaea and Bacteria?
A. The ability to perform photosynthesis
B. The ability to replicate chromosomes
C. The presence of RNA polymerase
D. The presence of a nuclear envelope - answerThe presence of a nuclear envelope
Valine is typically classified as a hydrophobic amino acid because a valine molecule has
which of the following types of side chains?
A. Polar and neutral
B. Nonpolar
C. Positively charged
D. Negatively charged - answerNonpolar
A teacher asks students to describe how the data collected in an experiment are
typically used as evidence. Which of the following responses is the most accurate?
A. "The data are used to confirm an existing belief."
B. "The data are used as facts that cannot be questioned or criticized."
C. "The data are used to support or reject a hypothesis."
D. "The data are used to make a theory into a law." - answer"The data are used to
support or reject a hypothesis."
Which of the following biomes is characterized by long winters and short summers snow
as the predominant form of precipitation soil that is acidic and poor in nutrients and
wooded areas made up mostly of evergreen trees with needlelike leaves?
A. Savanna
B. Boreal forest
C. Hot and dry desert
D. Tropical rain forest - answerBoreal forest
One strand of a certain segment of DNA has the following nucleotide sequence.
5' - A G A T G T C C A G T A - 3'
The complementary strand in the same segment of DNA most likely has which of the
following nucleotide sequences?
,A. 3' - T C T A C A G G T C A T - 5'
B. 3' - C T C G T G A A C T G C - 5'
C. 3' - G A G C A C T T G A C G - 5'
D. 3' - A G A T G T C C A G T A - 5' - answer
The overall process of aerobic cellular respiration is best described as the oxidation of
glucose to produce carbon dioxide and the reduction of oxygen to produce which of the
following?
A. ADP
B. NADH
C. Sucrose
D. Water - answerWater
A student uses stationary fans to investigate the effect of wind on water loss by plants.
The student divides the plants into three treatment groups and places each group in
front of a fan. The student sets the fan for each group to one of three different levels:
low medium or high. After 24 hours the student determines the amount of water that
was lost by each plant. To create a bar graph of the results the student should make the
height of each bar represent which of the following?
A. The fan speed for each treatment group
B. The number of plants in each treatment group
C. The average water loss for each treatment group
D. The duration of wind exposure for each treatment group - answerThe average water
loss for each treatment group
Interphase is the part of the cell cycle that includes which of the following?
A. Cytokinesis
B. Synapsis of homologous chromosomes
C. Replication of DNA
D. Condensation of chromosomes - answerReplication of DNA
A model of secondary succession typically includes which of the following?
A. The arrival of pioneer species
B. Changes in species composition over time
C. A community structure that remains stable over time
D. The addition of rock to Earth's surface as a result of a volcanic eruption -
answerChanges in species composition over time
Which TWO of the following are typically present in a bacterial cell but not in a virus?
A. Ribosomes
B. DNA replication machinery
C. A genome
D. Reverse transcriptase - answerRibosomes and DNA replication machinery
Wind turbines are used for which of the following activities?
, A. Maintaining a breeze over crops growing in an arid environment without using a lot of
farm machinery
B. Generating electricity without burning fossil fuels
C. Pumping natural gas without injecting chemicals into groundwater
D. Circulating water and nutrients in some seas without installing ocean floor pumps -
answergenerating electricity without burning fossil fuels
The nucleotides of a single strand of DNA are linked together by which of the following?
A. Ionic bonds
B. Peptide bonds
C. Hydrogen bonds
D. Phosphodiester bonds - answerPhosphodiester bonds
Which of the following pathways is common to both fermentation and aerobic cellular
respiration?
A. Glycolysis
B. Electron transport chain
C. Photophosphorylation
D. Citric acid cycle - answerGlycolysis
In a germinating seedling the root grows downward into the soil. Which of the following
correctly explains this phenomenon?
A. The root exhibits positive gravitropism.
B. The root exhibits positive phototropism.
C. The root cells respond to water in the soil.
D. The root cells need light for photosynthesis - answerThe root exhibits positive
gravitropism.
Which of the following best describes the role of transpiration in the water cycle?
A. It moves water from lakes and ponds to the oceans.
B. It moves water from the soil to the atmosphere.
C. It moves water from the atmosphere to the soil.
D. It moves water from Earth's surface to aquifers located below Earth's surface -
answerIt moves water from the soil to the atmosphere.
In which of the following cell types is a mutation most likely to have an impact on the
gene pool of a population?
A. Liver
B. Neuron
C. Skin
D. Sperm - answerSperm
Which of the following actions will best help maintain the diversity and abundance of
organisms in a terrestrial ecosystem?
A. Introducing a new exotic species
B. Preventing habitat destruction
