EOI Practice Questions

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EOI Practice Questions

• 2011

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Safety
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Bell Ringer 11 Feb 13, 2012
In many classrooms, lab exercises are performed
by small groups of students. The students are
supervised by a teacher who monitors each groups
progress periodically. When should you notify
your instructor of unsafe conditions in the
lab? A immediately B after the lab period C
after your data has been collected D when the
instructor comes by your station
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2.
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Lab Equipment

• SI Units

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• Jan consistently read the volume of liquids as
  shown. How would this practice impact her work?
• Her measurements would lack precision.
• Her measurements would be very accurate.
• Her measurements would be too high.
• Her measurements would be too low for less dense
  liquids.

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10. Which measurement units best describe the
size relationship of cells to organs? A
centimeters to meters B meters to millimeters C
millimeters to micrometers D micrometers to
centimeters
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Bell Ringer 14 Feb 17th, 2012
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Experimental Design

• Scientific Method
• Hypothesis
• Independent v. Dependent

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• Harvester ants often strip a bush of all of its
  leaves. Some people believe this helps the plant
  grow thicker, healthier stems. In an experiment,
  a student stripped off all the leaves from a set
  of plants. In a second set of identical plants,
  the student allowed ants to strip off the plants
  leaves. In order to improve this experimental
  design, it is most important to add a set of
  plants
• of a different species
• with its leaves left intact
• exposed to a different ant species
• that are dormant

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• A biology class wanted to develop a research
  project to predict the effects of a new highway
  on wildflower species found in the Piedmont
  region of Virginia. The class could best conduct
  such a study by sampling flowers found in the
  highway construction area
• during the time highway construction is taking
  place
• both before and after highway construction is
  completed
• immediately after highway construction is
  finished
• one year before highway construction begins

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Bell Ringer 13 Feb 15th, 2012
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56. Anita is studying the factors that affect
seed growth. She wants to test whether soaking
seeds in water affects the sprouting
process. Which should Anita measure to get the
most useful results? A growth of 100 soaked
seeds at a given temperature B growth of 100
regular seeds at different temperatures C
growth of 50 soaked and 50 regular seeds at a
given temperature D growth of 50 soaked and 50
regular seeds at different temperatures
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People long ago believed that maggots came from
meat. In the late 1600s, Francesco Redi made the
hypothesis that maggots came from flies rather
than from meat. Which of these experimental
designs could be used to test Redis hypothesis?
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• A biology class of 24 students decides to measure
  the height of each student and then calculate the
  average height for the class. Which of these is a
  possible source of error in this activity?
• The number of males and females in the class
• The difference in the ages of the students in the
  class
• The total number of students in the class
• The accuracy of making and recording measurements

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Bell Ringer 18 Feb 24th, 2011
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IV/DV
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49. Molly grew four bean plants in pots with the
same soil and provided each with an equal amount
of light. She gave each plant different amounts
of the reactants involved in photosynthesis. She
then measured the amount of gas produced by each
plant and their increase in height over a few
weeks. An independent variable in Mollys
experiment is the amount of A water given to
each plant B height gained by each plant C
oxygen produced by each plant D carbon dioxide
produced by each plant
Bell Ringer 22 March 2nd, 2012
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• A student wanted to look at plant growth in five
  different soil samples. He planted the same type
  of seeds in identical containers and left them
  together in full sunlight. He gave each plant the
  same amount of water and charted the growth of
  each plant stem. What is the independent variable
  in this experiment?
• Seeds
• Soil
• Light
• Container

Bell Ringer 32 April 2nd, 2012
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41. A rabbit population in a grassland ecosystem
is kept well below carrying capacity by its
primary predator, the coyote. A disease causes a
decrease in the coyote population. A biologist
will study how the disease affects the coyotes
and rabbits. He hypothesizes that if the coyote
population continues to decrease, then the rabbit
population will exceed carrying capacity. Which
of these is a dependent variable in this
study? A the carrying capacity B the rabbit
population C the introduction of the disease D
the introduction of a new predator
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45. A scientist wanted to determine the best
level of light intensity for photosynthesis in an
aquatic plant. He varied the light intensity and
measured the amount of a gas produced by the
plant at each level of light intensity. Which is
the dependent variable in this experiment? A
the type of light B the light intensity C the
amount of oxygen produced D the amount of
carbon dioxide produced
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• Which sentence best states the importance of
  using control groups?
• Control groups provide a method by which
  statistical variability can be reduced.
• Control groups allow comparison between subjects
  receiving a treatment and those receiving no
  treatment.
• Control groups eliminate the need for statistical
  tests and simplify calculations.
• Control groups eliminate the need for large
  sample sizes, reducing the number of measurements
  needed.

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• The data show the growth of two bean plants over
  several weeks using four different fertilizers.
  The experimental data would be more valid if
  which of the following variables was included in
  the experiment?
• Only one plant was tested.
• The plants were grown at variable temperatures.
• A fifth fertilizer was tested.
• A control without fertilizer was included for
  each plant.

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28. Scientists are conducting an experiment to
see how antibiotic resistance develops in
bacterial populations. They hypothesized that
bacteria exposed to an antibiotic once every 24
hours would develop resistance faster than
bacteria exposed to the antibiotic once every 12
hours. The scientists treat 50 dishes of
bacteria with the antibiotic once every 24 hours,
and 50 dishes of bacteria with the antibiotic
once every 12 hours. What would be the best
control group for this experiment? A 50 dishes
of bacteria that are never treated B 50 dishes
of bacteria that are treated every 6 hours C 50
dishes of bacteria that are treated every 48
hours D 50 dishes that do not contain bacteria
and are never treated
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• In the lab setup pictured below, a student is
  trying to determine the effect of pollutants on
  the growth of three groups of seeds. The results
  will not be valid because the experiment has no
  
• variable
• hypothesis
• control
• conclusion

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Hypothesis
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• The most valid and reliable test of this
  hypothesis would include an experimental group of
  pine seeds that was recovered from a fire area
  and pine seeds that were
• found before a fire
• tolerant of fire
• germinated after a fire
• placed in a fire

Bell Ringer 31 March 30th, 2012
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61. Specialized cells in certain male insects
produce a scent. Bart hypothesizes that if a
male insect does not have a scent, then he will
not attract females. Bart extracts the scent
molecules from some male insects and then coats a
model of the male insect with the scent. Bart
exposes fifty females to the treated model and
fifty females to a model of the male insect that
was not coated with the chemical. Which result
will provide support for this hypothesis? A
fewer females are attracted to the treated model
than the untreated model B more females are
attracted to the treated model than the untreated
model C females are not attracted to either the
treated model or the untreated model D females
are equally attracted to both the treated and the
untreated models
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• Two plant species found in a dry region of the
  western United States exhibit vastly different
  abilities to survive. Species A has very slow
  stem growth and few leaves but is very abundant.
  Species B has rapid stem growth and many leaves
  but is very rare. Which hypothesis is most likely
  supported by this information?
• Flower size and color may give species B an
  advantage over species A.
• Reduced root growth may give species A an
  advantage over species B.
• Leaf shape may give species B an advantage over
  species A.
• Reduced stem growth may give species A an
  advantage over species B.

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25. A biologist is studying a species of crab.
He hypothesized that if a crab has large pincer
claws, then it will have greater reproductive
success. He placed 50 crabs with small pincers
and 50 crabs with large pincers together in an
isolated area that closely resembled their
natural environment. He observed several
generations of the crabs over the next ten
years. If his hypothesis is correct, which result
would be most likely observe? A the percent of
crabs with large pincers would increase B the
percent of crabs with small pincers would
increase C the DNA in crabs with small pincers
would mutate in order to produce larger pincers D
crabs born with small pincers would develop
larger pincers and pass this trait to their
offspring
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50. Tyler is growing plants in a closed terrarium
to study the carbon cycle. He hypothesizes that
if plants are grown in a closed environment, then
the total amount of carbon in the terrarium will
remain constant. He measures the amounts of
different gases in the terrarium when he adds the
plants, and will measure again after one month of
allowing the plants to grow. Which result would
best support his hypothesis? A the amount of
oxygen decreased as the plants grow B the
amount of carbon dioxide increased as the plants
grow C the amount of carbon dioxide decreased
as the plants grow D the amount of oxygen
became less than the amount of carbon dioxide as
the plants grow
Bell Ringer 28 March 26th, 2012
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46. Jody placed four equal-sized tomato plants in
separate containers. She gave each plant the
same amount of light and nutrients, different
amounts of water, and frequently measured the
amount of oxygen produced by each plant. Which
is the hypothesis Jody was most likely studying
in this experiment? A if the amount of light
is increased, then the rate of photosynthesis
will increase B if the amount of nutrients is
increased, then the rate of cellular respiration
will increase C if the amount of water is
increased, then the rate of photosynthesis will
increase D if the amount of water is increased,
then the rate of cellular respiration will
increase
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Bell Ringer 17 Feb 23rd 2012

• Which hypothesis is best supported by this graph?
  
• The population of cardinal predators increased.
• Dominant cardinal chicks were the first to be
  fed.
• A disease of cardinals spread throughout the
  park.
• The cardinals food supply increased.

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• The hypothesis best supported by this graph is
  that these beetles are most active when the area
  is
• richest in oxygen supplies
• coolest with some sunlight
• wettest from dew
• free from predators

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32. Steve studied the factors that affect the
decomposition of vegetable matter by soil
microbes. He put four pieces of carrot of equal
weight into each of three plastic bags filled
with soil. He added different amounts of water
to each bag and kept them all at room
temperature. Every two days, Steve removed the
carrot pieces from each bag to weigh them. Which
hypothesis was Steve most likely testing in his
experiment? A if the temperature is reduced,
then there is increased decomposer activity B
if the soil type is changed, then the rate of
decomposition will decrease C if the moisture
content of the soil is increased, then there is
increased decomposer activity D if the weight
of the decomposing matter is increased, then the
rate of decomposition will decrease
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63. Helper birds are young birds that delay
reproduction and instead help their parents raise
more offspring. A researcher hypothesized that
if a bird is a helper, then it will have higher
reproductive success than non-helper birds. The
researcher observed many birds over the course of
their lives. She found that helpers produced
less offspring than non-helpers, but that those
offspring were healthier and survived longer than
offspring of non-helpers. Based on these
results, what should the researcher do with the
hypothesis? A accept, because helper birds
had less offspring B reject, because non-helper
birds had more offspring C accept, because
helper birds had less healthy, shorter-lived
offspring D reject, because non-helper birds
had less healthy, shorter-lived offspring
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Graphing
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• According to the graph, how many mice will be
  born in week 5 if the trend continues?
• 90
• 100
• 140
• 160

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• A study on a poultry farm was conducted to
  determine the percentage of vitamin supplement
  necessary to add to the feed of turkeys in order
  to maximize their growth. According to this data,
  what percentage of vitamin supplement should be
  added to the turkeys diet?
• 6
• 8
• 10
• 14

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• According to the graph, the highest metabolic
  rate is found in
• reptiles
• amphibians
• mammals
• birds

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• According to the table, which graph below
  illustrates the calories used for 1 hour of
  jogging followed by 2 hours of walking?
• A
• B
• C
• D

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Organization

• Cells, Tissues, Organs, Organisms, Populations,
  Communities, Ecosystems, Biosphere

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Populations
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• An experiment is designed to clear an oak-hickory
  forest and replant the area with pines. Which of
  the following species would be most threatened by
  this experiment?
• Cardinal
• Hooded warbler
• Field sparrow
• Summer tanager

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• This graph shows the sizes of lynx and hare
  populations between the years of 1845 and 1940.
  If a predator of the lynx enters the food chain,
  you might expect the number of
• lynx and hares to become equal
• lynx to increase
• hares to increase
• hares and lynx to decrease

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42. A biologist was studying a deer herd living
in a 100 square kilometer wildlife area. He
determined that the current population of 3000
deer is half the carrying capacity of the
wildlife area. What would the deer population
density be if the population were at carrying
capacity? A 15 deer per square kilometer B
60 deer per square kilometer C 1500 deer D
6000 deer
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• In the graph below, what is the population of
  deer at the carrying capacity of the environment?
  
• 30
• 10
• 50
• 70

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• This graph suggests that from 1840 to 1920, the
  carrying capacity for sheep in Tasmania was
  approximately
• 0.75 million
• 1.00 million
• 1.75 million
• 2.25 million

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Food Chains, Webs, Pyramids
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• A mushroom and a humpback whale are alike because
  both are
• motile
• prokaryotic
• unicellular
• heterotrophic

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• Which level of this food pyramid represents the
  largest biomass?
• Bass
• Algae
• Minnows
• Copepods

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Symbiosis
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Cycles
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Cells
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• The eukaryotic organism described above should be
  classified as
• an animal
• a plant
• a bacterium
• a fungus

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Homeostasis
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Osmosis
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Use the information to answer questions 4-6. A
biology student wants to study how animal cells
react when places in distilled water and in a
salt solution. The student used the following
procedure 1) Place a small sample of cells on
a microscope slide and place a cover slip over
the sample. Add a few drops of distilled water
under the cover slip. 2) Observe the cells in
the distilled water solution under a
microscope. 3) Place a small sample of cells on
a microscope slide and place a cover slip over
the sample. Add a few drops of 20 salt solution
under the cover slip. 4) Observe the cells in
the salt solution under a microscope. 4. What
is the dependent variable in this experiment? A
the salt concentration B the number of cells in
the sample C the type of animal that the cells
come from D the movement of water across the
cell membrane D salts are moving out of the
cells into the surrounding solution
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Photosynthesis/Cell Respiration
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8. Which method should a scientist use to view
the site of photosynthesis in a plant cell? A
use a magnifying glass to view the chloroplasts B
use a magnifying glass to view the
mitochondria C use a microscope to view the
chloroplasts D use a microscope to view the
mitochondria
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44. A scientist wants to measure how much gas is
released by a plant to estimate how fast it is
photosynthesizing. Which measurement should the
scientist take? A meters of carbon dioxide B
milliliters of oxygen C grams of carbon
dioxide D centimeters of oxygen
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47. A scientist wants to investigate the effect
of light intensity on the rate of photosynthesis
in a plant species. In an experiment, he will
expose these plants to different light
intensities and measure the amount of gas
produced with a special sensor. Which method
should be used to collect data in his
experiment? A measure the amount of oxygen
produced by the plants at regular time intervals
using a stopwatch B measure the amount of
carbon dioxide produced by the plants at regular
time intervals using a stopwatch C monitor the
light intensity with a pipette and measure the
amount of oxygen consumed by the plants D
monitor the light intensity with a pipette and
measure the amount of carbon dioxide consumed by
the plants
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Cellular Reproduction

• Mitosis Meiosis

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DNA/RNA
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Genetics
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17. In a certain group of lab mice black fur is
dominant and brown fur is recessive. If two
heterozygous mice mate and produce 16 offspring,
how many of the offspring will probably have
brown fur? A 0 B 4 C 8 D 12
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15. Robert is conducting breeding experiments
with mice. He crossed two brown mice and found
that 25 of their offspring were white. Which
conclusion from this experiment is most
logical? A White color is dominant over brown
color B One of the parent mice is homozygous
for the dominant allele C All of the offspring
carry two copies of the recessive allele D The
white offspring are homozygous for the recessive
allele
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Classification
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• According to this chart, the insects that are
  most
• closely related are the
• springtails and bristletails
• springtails and proturans
• bristletails and mayflies
• dragonflies and proturans

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Evolution

• Natural Selection
• Analogous/Homologous

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Behavior
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64. Male bowerbirds build and decorate bowers,
which are structures used for courtship and
mating. Each species of bowerbirds builds a
unique type of bower. A researcher raised a male
bowerbird in isolation from all other birds.
During this time, he observed that the bird built
bowers like those of its own species. What would
most likely happen if a male bowerbird were
raised with bowerbirds of a different species? A
it would not build any bowers B it would
build bowers like those of its own species C it
would build bowers like those of the species with
which it was raised D it would build bowers
with features from both its own species and the
species with which it was raised
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62. Joshua is studying the mating behavior of
hanging flies. Female hanging flies typically
require their male mates to bring them a gift,
such as a moth to eat. Joshua raised a group of
female and male hanging fly larvae in isolation
from adult hanging flies. When these larvae
became adults, the females also required a gift
from their mates. Which explanation is the best
for this behavior? A the behavior is acquired
randomly B the behavior is learned through
imprinting C the behavior is learned through
experience D the behavior is inherited through
genes
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Bell Ringer 30 March 29th, 2012