Download Review Keystone Biology Multiple choice

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A1 BASIC BIOLOGICAL PRINCIPLES
Scientists discovered aliens on Mars. They wanted to classify these different
aliens and so they studied them and came up with the information in the table below.
They separated the aliens into TWO groups (A and B) based on their characteristics.
Read the information in the table and then answer the following 2 questions.
Alien
Species
Nucleus
found in
cell?
A
B
Yes
No
Membranebound
organelles
found in
cell?
Yes
No
Contains DNA
Relative size
of each cell
Yes
Yes
large
small
1.
Which of the species of aliens is most like a prokaryote from Earth?
a. A
b. B
c. Both A and B
d. Neither A or B
2.
Which of the species of aliens is most like an eukaryote from Earth?
a. A
b. B
c. Both A and B
d. Neither A or B
3.
Below are various levels of biological organization. Which one correctly lists the
terms from the smallest to largest?
a. cells, organs, tissues, organelles, organisms, organ systems
b. organelles, cells, tissues, organs, organ systems, organisms
c. organisms, organelles, cells, organs, tissues, organ systems
d. tissues, organelles, cells, organisms, organs, organ systems
1
4.
What if the main job of the mitochondria?
a. makes energy
b. makes food
c. makes protein
d. stores water
5.
If a cell needs to make lots of protein, which organelle do they need?
a. nucleus
b. ribosomes
c. smooth ER
d. vacuoles
6.
What is the function of chloroplasts?
a. make food
b. make glucose
c. perform photosynthesis
d. all of the above
7.
Which of the following is a characteristic shared by all prokaryotic and eukaryotic
organisms?
a. adapt and respond to environment
b. obtain and use energy
c. reproduce on their own
d. all of the above
8.
What is the job a vacuole?
a. makes protein
b. stores genetic material
c. stores water and nutrients
d. surrounds all cells
9.
What is the function of the rough endoplasmic reticulum?
a. breaks down toxic materials
b. makes food
c. stores water
d. transports proteins
2
10.
Which of the following is NOT found in all cells?
a. cytoplasm
b. genetic material
c. mitochondria
d. plasma membrane
11.
Into what two groups can all of life on earth be divided?
a. animals and plants
b. eukaryotes and prokaryotes
c. eukaryotes and viruses
d. prokaryotes and fungi
A.2 CHEMISTRY FOR LIFE
12.
Which of the following is a unique property of water that helps support life on
earth?
a. adhesion
b. cohesion
c. high specific heat
d. all of the above
13.
What are the building blocks of carbohydrates?
a. amino acids
b. lipids
c. nucleic acids
d. sugars
14.
What molecules are joined together to make proteins?
a. amino acids
b. lipids
c. nucleic acids
d. sugars
3
Use the diagram below to answer the next 3 questions.
15.
In the diagram above, which of the following is true?
a. This process requires a lipid.
b. Water is added so that glucose can break down.
c. Water is removed in order to join to glucose molecules together, which
makes maltose.
d. All of the above are true.
16.
What is the name of this process (in diagram above)?
a. activation energy
b. dehydration synthesis
c. hydrolysis
d. replication
17.
What would the opposite reaction from the one in the diagram show?
a. how enzymes are need to build maltose
b. how water is added to break apart maltose
c. how water is lost in order to make maltose
d. how water is only needed to build molecules and not to break molecules
down
4
Use the diagram below to answer the next 3 questions.
18.
Which enzyme has the highest optimal temperature?
a. Enzyme 1
b. Enzyme 2
c. Both enzymes 1 and 2
d. Neither enzyme 1 or 2
19.
Humans have an average body temperature of 37°C. Which enzyme is most likely
one that can work in the human body?
a. Enzyme 1
b. Enzyme 2
20.
Which enzyme would probably be destroyed by a fever?
a. Enzyme 1
b. Enzyme 2
c. Both enzymes 1 and 2
d. Neither enzyme 1 or 2
5
21.
In the human stomach, hydrochloric acid is released to help digest proteins. This
produces a pH of 2. What enzyme works best in your stomach?
a. an enzyme that builds carbohydrates
b. an enzyme that has an optimal pH of 2
c. an enzyme that has an optimal temperature of 50°C
d. an enzyme that needs a pH higher than 7
22.
What is a function of carbohydrates in humans?
a. act as enzymes
b. carry oxygen to cells
c. make up the cell membrane
d. used for energy
Use the diagram below to answer the next 3 questions.
6
23.
Which of the molecules above represents glucose?
a. 1
b. 2
c. 3
d. 4
24.
Which of the molecules is an amino acid?
a. 1
b. 2
c. 3
d. 4
25.
Which of the molecules above shows the healthy fatty acid (polyunsaturated)?
a. 1
b. 2
c. 3
d. 4
A.4 HOMEOSTASIS AND TRANSPORT
Use the diagram below to answer the next 2 questions.
7
26.
You set up a lab using dialysis tubing to create a bag. You fill the bag with water
and place it into a beaker containing blue dye. You let the bag sit in the blue dye
for 30 minutes and observe that the liquid inside of the bag turned blue. Which of
the following best explains your results?
a. The blue dye diffused into the bag from high to low concentration.
b. The blue dye was actively pumped into the beaker.
c. The blue just stained the outside of the bag.
d. None of the above is correct.
27.
You set this same experiment up and use methyl orange instead of blue. After 30
minutes there is no change in color in the bag. You set the experiment up again and
wait several hours and still see no change in color in the bag when surrounded by
methyl orange in the beaker. Which of the following best explains your results?
a. The methyl orange dye actually went into the bag and then changed color.
b. The methyl orange dye could not be actively pumped into the bag.
c. The methyl orange left the bag via osmosis.
d. They methyl orange molecules were too big to fit through the holes in
the bag.
Use the diagram below to answer the next 2 questions.
8
28.
In the diagram above, animal cells are placed into three different solutions: A
(hypotonic), B (isotonic), and C (hypertonic). Explain what is happening and why to
the cell in solution A.
a. Water bursts out of the cell via osmosis.
b. Water enters and leaves the bag in equal amounts.
c. Water enters the cell by osmosis and causes the cell to burst.
d. Water leaves the cell by osmosis.
29.
If you are given a medicine from an IV bag directly into your blood stream that is
hypertonic to your red blood cells, what would happen?
a. Your red blood cells would actively pump water out so that they shrivel.
b. Your red blood cells would burst due to osmosis.
c. Your red blood cells would shrivel because water would leave them via
osmosis.
d. Your red blood cells would stay the same because no osmosis would occur.
Plants take in water through their roots by osmosis. In order to do that there must be a
higher concentration of water in the soil compared to the cells of the roots. Use this
information to answer the next 4 questions.
30.
Which is
a.
b.
c.
d.
true of osmosis?
The process requires energy.
This process is a type of active transport.
Water moves from high to low concentration.
Water moves from low to high concentration.
31.
Farmers sometimes spray water on their fields during dry weather. If the water
evaporates, the salts from the water can be left behind in the soil. Over time,
what could possibly happen to the crops in such a field?
a. Plants take in the salt and actively pump the water out.
b. The plants actively pump water into the soil, which requires energy.
c. The plants gain lots of water from the soil. The plants grow rapidly.
d. Water moves out of the plants and into the soil by osmosis because the
soil is dry and slightly salty. The plants would then wilt and possibly die.
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32.
What happens to a plant when it is not watered?
a. The cells of the plant show plasmolysis (shriveling of the interior of a
plant cell).
b. The plant wilts.
c. The vacuoles in the plant’s cells shrink.
d. All of the above
33.
You are on a cruise to Bermuda (in the Atlantic Ocean). The boat sinks and you
must get in a lifeboat for safety. People in the lifeboat begin to worry about
having enough drinking water to survive until rescuers find you. One man says,
“Don’t worry! We have plenty to drink because we can drink the ocean water!”
What would you say to that man? Use your knowledge of biology.
a. “Don’t drink the saltwater because it will make you dehydrate faster than
not drinking anything.”
b. “Don’t drink the saltwater because the plankton will kill you.”
c. “I will drink the saltwater because it is better than not drinking
anything.”
d. “Only drink the saltwater at night after the sun goes down to prevent
dehydration.”
34.
In a cell membrane, the proteins have several jobs. Which of the following plays an
important in organ transplants?
a. Proteins that act as enzymes.
b. Proteins that act as markers or antigens on the outside of a cell.
c. Proteins that aid in diffusion.
d. Proteins that help transport materials.
35.
Which of the following is an example of thermoregulation?
a. a dog panting
b. a person sweating
c. a rabbit’s big, hairless ears
d. all of the above
36.
Which of the following is true about active transport?
a. moves materials from high to low concentration
b. moves materials from low to high concentration
c. requires energy
d. both b and c are true
10
A.3 BIOENERGETICS
A biologist measured the amount of oxygen that a single corn plant produced over a 24hour period. This corn plant was growing in a farmer’s field in the middle of summer in
Pennsylvania. The day was bright and sunny, and the wind was calm. The night was dry,
but warm. The results of the observations are in the table below. Use this data to
answer the next 4 questions.
Hour
Oxygen
production
(ppm)
6:00 A.M.
8:00 A.M.
10:00 A.M.
12:00 A.M.
2:00 P.M.
4:00 P.M.
6:00 P.M.
8:00 P.M.
10:00 P.M.
12:00 midnight
2:00 A.M.
4:00 A.M.
6:00 A.M.
9
17
31
49
68
81
79
24
0
0
0
0
9
37.
Which process is producing oxygen during the daytime hours?
a. anaerobic respiration
b. cellular respiration
c. hydrolysis
d. photosynthesis
38.
Predict what the data would look like if the day had been heavily overcast (very
cloudy).
a. The oxygen levels would be higher during the daytime hours.
b. The oxygen levels would be lower during the daytime hours.
c. The oxygen levels would remain exactly the same during the daytime
hours.
d. None of the above
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39.
Why does the oxygen production equal zero ppm from 10:00 P.M. until 4:00 A.M.
a. The corn plant completely shuts down and stops cellular respiration in the
dark.
b. The corn plant does not perform photosynthesis in the dark and
therefore does not produce oxygen.
c. The corn plant is producing CO2 and cannot produce oxygen at the same
time.
d. The corn plant stops all gas exchange at night.
40.
If you planted a garden, what type of weather conditions would you hope for in
order to maximize your plants’ growth?
a. all rainy, cloudy days
b. all sunny, hot days
c. cool, dry days with little or no sun
d. many sunny days with occasional rainy days
Look at the graph below and use it to help you answer the next 2 questions.
41.
What does this graph indicate about the relationship between carbon dioxide in
the atmosphere and global temperatures?
a. As the carbon dioxide levels increased, the global temperature
decreased.
b. From 1880 – 1940 carbon dioxide levels remained steady while global
temperatures increased over 10°F.
c. The trend from 1880 – 2000 shows that the levels of carbon dioxide have
increased as well as the global temperatures.
d. There is no relationship between carbon dioxide and global temperature.
12
42.
After interpreting this graph, what should to be done to slow global warming?
a. Global warming will slow if carbon dioxide levels reach 500 parts per
million.
b. It appears that decreasing carbon dioxide levels in the atmosphere will
lower global temperatures.
c. More carbon dioxide should be made and put into the atmosphere
because it will lower global temperatures.
d. Nothing can be done to slow global warming because increasing carbon
dioxide causes global temperatures to decrease.
43.
What is required (as an input) for aerobic respiration?
a. carbon dioxide and water
b. carbon dioxide, water, sunlight
c. glucose and ATP
d. glucose and oxygen
44.
What is required (as an input) for photosynthesis?
a. carbon dioxide and water
b. carbon dioxide, water, sunlight
c. glucose and ATP
d. glucose and oxygen
45.
How does ATP supply energy to cells?
a. by adding a phosphate
b. by energizing the nucleus
c. by releasing a phosphate and becoming ADP
d. None of the above
46.
Which of the following is true about energy transformations?
a. photosynthesis and respiration both convert chemical energy into light
energy
b. photosynthesis converts light energy into chemical energy
c. respiration converts chemical energy into different chemical energy
d. both b and c are true
13
47.
What is a major difference between aerobic and anaerobic respiration?
a. Aerobic makes less ATP (energy) than anaerobic respiration.
b. Aerobic makes much more ATP (energy) than anaerobic respiration.
c. Aerobic uses oxygen and anaerobic respiration does not.
d. Both b and c are true.
B.1 CELL GROWTH AND REPRODUCTION
Look at the diagram below and use it to help you answer the next 3 questions.
48.
How does DNA replication take place?
a. Both strands of DNA are composed of entirely of parent DNA.
b. Both strands of DNA are newly synthesized and the old DNA is
destroyed.
c. One strand of DNA is the original template and one strand is newly
synthesized.
d. The newly synthesized DNA is pulled apart by DNA polymerase.
14
49.
If a mistake is made during DNA replication and the mistake is not fixed, what are
the consequences?
a. If the strand with the mistake is replicated, the mistake is passed on to
the next DNA molecule.
b. Mistakes never happen during DNA replication.
c. The template DNA will be taken out and the new strand left to do the
job.
d. None of the above is true.
50.
If a parent strand of DNA contains the sequence AATCCGAT then what is the
sequence of the complementary and newly synthesized strand?
a. AATCCGAT
b. TAGCCTAA
c. TATAGCTA
d. TTAGGCTA
51.
What makes the genetic code in DNA?
a. the order of the bases
b. the phosphates
c. the sugars
d. none of the above
52.
What are the building blocks of DNA?
a. amino acids
b. sugars
c. lipids
d. nucleotides
15
Use the diagram below to answer the next 4 questions.
53.
In the diagram above, there are two different processes of cell division. Which
side best represents a cell undergoing meiosis?
a. only side A
b. only side B
c. both A and B
d. neither A or B
54.
Which process makes sex cells?
a. only side A
b. only side B
c. both A and B
d. neither A or B
16
55.
Which process is responsible for making very diverse (different) siblings?
a. only side A
b. only side B
c. both A and B
d. neither A or B
56.
Why do multicellular organisms do mitosis?
a. to grow
b. to heal
c. to replace dead cells
d. all of the above
57.
If a body cell has 46 chromosomes, how many chromosomes should be in a sex cell?
a. 13
b. 23
c. 46
d. 92
58.
What starts cell division?
a. During the cell cycle, genes make proteins that signal the cell to begin
division.
b. The cell cycle makes sure that every cell divides.
c. When cells are crowded they start division.
d. All of the above are true.
59.
Why is it important that sex cells have half the number of chromosomes as body
cells?
a. Body cells are bigger and need more DNA to do their jobs.
b. The sex cells each contribute a full set of DNA to the baby.
c. The sex cells each contribute half of the chromosomes so that the baby
gets a full set.
d. The sex cells must move quickly so they need to be lightweight which
means they need less DNA.
17
B.2 GENETICS
Use this codon chart to help you answer some of the following questions.
60.
Genes are used to make proteins. If a gene has the sequence TAC GGG TAT ATT,
what mRNA strand would be made?
a. ATG GGG ATA TAA
b. AUG CCC AUA UAA
c. AUG GGG ATA TAA
d. TTA TAT CCC CAT
61.
If a mRNA strand is AUG CGG AAG UAA, what amino acids would make up the
protein?
a. methionine-lysine glysine
b. methionine-arginine-lysine
c. alanine-proline-histidine
d. stop-tyrosine-serine
18
Use the information below to answer the next question.
Original DNA:
T
T
G
A
A
G
C
T
A
A
T
T
Mutated DNA:
T
T
G
A
G
A
G
C
T
A
A
T
62.
What type of mutation is in the diagram above?
a. frameshift
b. none of the above
c. point mutation
d. single base substitution
Use the diagram below to answer the next question.
63.
In the diagram above, which shows a translocation mutation?
a. 1
b. 2
c. 3
d. 4
19
T
64.
Does a mutation change always change protein?
a. No, some mutations are silent and do not change the protein.
b. No, some mutations cause nonsense mutations.
c. Yes, mutations always mess up proteins.
d. None of the above.
65.
What does a gene make?
a. a carbohydrate
b. a lipid
c. a polysaccharide
d. a protein
66.
How is one gene different than another gene?
a. Some have uracil and others have thymine.
b. The enzymes used to unzip DNA.
c. The order of the sugars and phosphates.
d. The order or sequence of the bases.
67.
In which order do the steps of translation (listed below) occur?
A
B
C
D
E
Peptide bonds occur between amino acids.
The ribosome attaches to the mRNA.
tRNA brings the first amino acid to the ribosome.
Protein is released.
The codon on mRNA bonds with the anticodon on the first tRNA.
a.
b.
c.
d.
A, B, C, D, E
B, A, C, D, E
B, C, E, A, D
E, D, C, B, A
20
Use the pedigree on below to answer the next 2 questions. The shaded shapes indicate a
person who has sickle-cell anemia (a disease caused by a recessive gene).
68.
What is the genotype of person 1?
a. AA
b. Aa
c. aa
d. A?
69.
What is the genotype of person 3?
a. AA
b. Aa
c. aa
d. A?
21
Imagine that you are 28 years old and about to have your first child. Your eyes are blue
and your spouse (husband or wife) has brown eyes. Your spouse was adopted so you do
not know the eye color of his or her biological parents. You remember from high school
biology that brown eyes are dominant to blue eyes. Use this information to answer the
next 3 questions.
70.
Your spouse wants to know what the chances are of having a blue-eyed child. He
thinks because you have blue eyes, that your child will definitely have blue eyes.
What do you tell him?
a. “It is impossible to determine chance because you do not know what color
eyes your spouse’s parents had.”
b. “There is a 25% chance that we will have a blue-eyed child.”
c. “There is a 50% chance that we will have a blue-eyed child.”
d. “There is no chance of having a blue-eyed child because brown eyes are
dominant to blue eyes.”
71.
How does the gene for blue eyes differ than the gene for brown eyes?
a. A different type of carbohydrate would be made from the DNA.
b. The blue eye gene shows incomplete dominance over the brown-eyed
gene.
c. The type of protein made from the two alleles (genes) would differ.
d. While the proteins are identical, they refract light differently creating
different colors.
72.
You discover that your spouse’s biological mother had blue eyes. Now your spouse
thinks that your child will definitely have blue eyes. What do you tell your spouse?
a. “There is a 50% chance that we will have a blue-eyed child because you
are heterozygous for brown eyes since your mother had blue eyes.”
b. “There is only a 25% chance that we will have a blue-eyed child because
you are homozygous dominant.”
c. “You are right because blue-eyed grandmothers always have blue-eyed
grandchildren.”
d. None of the above are true
22
73.
In some plants, flower color shows incomplete dominance. The two homozygous
conditions make either red or white flowers. The heterozygous condition makes
pink flowers. If a red flowered plant is crossed with a pink flowered plant, what is
the chance of having offspring with pink flowers?
a. 0%
b. 25%
c. 50%
d. 100%
74.
A woman sues her ex-husband for child support of their child. The woman has type
A blood, the child has type O blood, and the ex-husband has type AB. Remember
that A and B genes are codominant and o genes are recessive. Could the exhusband be the child’s father?
a. No, blood type is not inherited.
b. No, these parents cannot have a type O child.
c. Yes, these parents can have a type O child.
d. None of these
75.
This is a picture of a rare trait called cycloptism. Cycloptism is a
recessive, sex linked trait that causes extraordinarily hairy, one-eyed
humans. A woman who is a carrier of cycloptism marries a normal male.
If they have a son, what is the chance that he is a cyclops?
a. 0%
b. 50%
c. 75%
d. 100%
76.
In human eye color, blue eyes are recessive to brown eyes. A man who is
heterozygous for brown eyes marries a woman who is also heterozygous for brown
eyes. What are their chances of having a child with blue eyes?
a. 0%
b. 25%
c. 75%
d. 100%
23
B.3 EVOLUTION
The diagram below shows the gene frequencies for a population of flowers over 3
generations. The plants in the boxes are the only survivors to have offspring. Use this
diagram to answer the next 3 questions.
77.
What happened to the gene frequencies from generation 1 to generation 3?
a. The frequency for R increased and the frequency of r decreased.
b. The frequency of r increased and the frequency of R decreased.
c. The frequency of white flowers increased.
d. The gene frequencies remained the same.
78.
Which of the following is a reasonable explanation for the results seen in the
diagram?
a. Adaptive radiation helped to spread the white flowers around randomly.
b. Evolution did not occur because plants cannot reproduce quickly enough.
c. Genetic drift made the small population change rapidly.
d. Natural selection favored the white flowers.
24
79.
Which of the following is a possible reason for the changes seen between
generation 1 and generation 2?
a. Red flowers may have had a better chance of survival due to natural
selection and therefore may produce more offspring.
b. Red is a dominant allele and white is recessive. This means that red is
able to produce more flowers than white.
c. White flowers changed into red flowers because red flowers survive
better.
d. All of the above are true.
Use the following information to answer the next 2 questions.
Giant tortoises are found on the Galapagos Islands. At first tortoises lived only on
Isabela Island and had dome-shaped shells (see figure 1). The tortoises ate green plants.
Isabela Island has a relatively wet climate and lots of different plants.
Today tortoises are found on the other islands in the chain. On Española (Hood) Island,
there are tortoises that have a 'saddleback' shell (see figure 2). The 'saddleback' shell
is elevated above the neck and flared above the hind feet. On Española Island the
climate is drier and there is almost no ground vegetation (plants). Prickly pear cactus (a
major source of food and water for the 'saddleback' tortoises) has a tree-like form; the
woody trunk holds fleshy green parts of the plant high off the ground.
25
80.
What can account for the differences in the two groups of tortoises that are seen
today?
a. The gene frequencies changed to prevent evolution.
b. The gene frequencies only changed because the islands were almost the
same.
c. The gene frequencies remained exactly the same because they are all
just tortoises.
d. The gene frequencies shifted because the higher elevation around the
neck was an advantage on Española Island, which made those tortoises
with the higher shell better able to survive.
81.
How might a scientist explain how tortoises with the 'saddleback' shell came to
be?
a. Dome-shaped shells were a disadvantage so tortoises with this type of
shell stay off of Española Island and only saddleback shelled tortoises
went to this island.
b. Individually tortoises changed their shell shapes from dome to
saddleback. When other tortoises noticed how successful the shell was,
they changed too.
c. The dome-shaped shells turned into saddleback shells on Española Island
due to natural selection.
d. The tortoises on Española Island varied originally. Some had shells that
had higher necks than others. In the drier climate it became an
advantage to have a shell that was slightly elevated so that the tortoise
could stretch and reach food that was high off of the ground. Eventually
the more elevated shell became more common due to natural selection.
26
82.
The diagram below shows two related fox species. The red fox’s reddish coloring
allows it to blend into its forest habitat, while the kit fox’s coloring allows it to
blend into its desert environment. The red fox has small ears, while the kit fox
has large ears to help rid its body of heat. Which of the following statements
gives the best exclamation for the differences between foxes?
a. The foxes developed different adaptations because the kit fox
preferred sunnier environments than the red fox.
b. The foxes evolved differences in appearance as they adapted to
different environments via natural selection.
c. The foxes evolved differently because their ancestors were trying to
avoid competition.
d. The foxes wanted to evolve to prevent competition.
83.
Fireflies mate only with other fireflies that have the appropriate blinking pattern.
What kind of isolation is this?
a. behavioral
b. genetic
c. geographic
d. temporal
84.
Which of the following provides evidence for evolution?
a. comparative embryology
b. fossils
c. genetic comparisons
d. all of the above
85.
Which of the following can contribute to the formation of a new species?
a. genetic drift
b. isolating mechanisms
c. migration
d. all of the above
27
86.
When penicillin was first introduced, it was very effective in destroying most of
the bacteria that cause gonorrhea. Today, certain varieties of this bacterium are
resistant to penicillin. Which statement best explains the appearance of these
resistant varieties?
a. Penicillin killed the susceptible bacteria, while naturally resistant
varieties survived and reproduced.
b. Penicillin stimulated the bacteria to become resistant, and this resistance
was passed to the offspring.
c. Penicillin stimulated the production of antigens in the resistant bacteria.
d. Penicillin used today is not as strong as the penicillin used when it was
first introduced.
B.4 ECOLOGY
Use the graph below to answer the next 3 questions.
NUMBER OF ORGANISMS
YEAST POPULATION GROWTH
CURVE
87.
700
600
500
400
300
200
100
0
0
2
4
6
8 10 12 14 16 18
AGE OF POPULATION (HOURS)
What is the carrying capacity of this yeast population?
a. 200
b. 350
c. 500
d. 650
28
88.
When is the most rapid growth seen in the graph?
a. at 0 hours
b. from 0 to 2 hours
c. from 5 to 11 hours
d. from 16 to 18 hours
89.
If a population has reached its carrying capacity, what is true for that population?
a. A limiting factor probably caused the population to level off.
b. It will never reach zero population growth.
c. The population density reaches the minimum.
d. The population drastically falls in number.
The graph below shows how the population sizes of rabbits and wolves in a forest changed
over time. Wolves are known predators of rabbits. Use this graph to help you answer
the next 4 questions.
POPULATION OF RABBITS AND WOLVES, 1980-2004
50
NUMBER OF ORGANISMS
45
40
RABBITS
WOLVES
35
30
25
20
15
10
5
0
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
ROUND NUMBER
90.
When the rabbit population increased, what happen to the wolf population?
a. The wolf population decreased due to starvation.
b. The wolf population increased because they had plenty of rabbits to eat.
c. The wolf population stayed the same because rabbits do not affect the
wolves.
d. All of the above are true.
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91.
How do you think the wolf population affected the rabbit population?
a. An increase in the wolf population caused the rabbit population to
decrease because rabbits were the prey of the wolves.
b. An increase in the wolf population made the rabbit population increase.
c. The wolf population remained constant.
d. When the wolf population increased, it caused the rabbit population to
decrease because the wolves were dying.
92.
What other factors could cause the decrease in the rabbit population?
a. a hard, cold winter
b. increased predator populations
c. lack of food
d. all of the above
93.
In some areas of Pennsylvania, the deer population has grown rapidly. Deer have
become somewhat of a nuisance because they eat people’s flowers and plants. You
have a neighbor who complains that the “nasty old deer” are eating everything in
his garden. Your neighbor thinks that the deer population has increased because
deer simply live longer. Because he knows that you are taking biology he asks "why
are the deer eating my plants now more so than ever?" What do you tell your
neighbor?
a. Deer know to look for houses that have fenced-in gardens.
b. Deer like noise and people so they gather near towns.
c. Near towns, the deer do not have as many predators (including hunters)
so the population increases.
d. The deer are hungrier than they used to be.
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Use the diagram of the nitrogen cycle below to answer the next 2 questions.
94.
What organism in the soil helps plants get nitrogen in the form that they need it?
a. fungi
b. nitrifying bacteria
c. the mole
d. none of the above
95.
What role do denitrifying bacteria have in this ecosystem?
a. They convert ammonium into nitrate.
b. They convert nitrates back into nitrogen gas.
c. They help convert nitrogen gas into nitrate.
d. They perform nitrogen fixation.
31
Use the food web below to answer the next 3 questions.
96.
In this food web, which organism is a producer?
a. bird
b. lizard
c. plant
d. rabbit
97.
In this food web, which organism is an omnivore?
a. bird
b. eagle
c. plant
d. rabbit
98.
In this food web, which organism is a primary or first consumer?
a. caterpillar
b. eagle
c. lizard
d. plant
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