WorksheetsGenBio Fall 2025 Semester Exam Review
Total questions: 81
Worksheet time: 41mins
Name
Class
Date
1.
Last Name, First Name
4 lines
2.
What period do you have Biology?
a)
2nd Period
b)
4th Period
3.
1. Biology is the study of
a)
minerals and rocks
b)
life
c)
matter and energy
d)
the weather
4.
2. Which of the following is NOT necessarily a characteristic of living things?
a)
homeostasis
b)
metabolism
c)
complexity
d)
reproduction
5.
3. Why is a virus not considered a living thing?
a)
It does not have a nucleus or organelles like living cells do.
b)
It cannot reproduce on its own and relies on a host cell to replicate.
c)
It is too small to be classified as a living organism.
d)
It does not have DNA or RNA to store genetic information.
6.
4. An experiment was designed to investigate the effect of caffeine from energy drinks on the heartbeat of teenagers.
What part of the experiment was the heartbeat?
a)
independent variable
b)
dependent variable
7.
5. An experiment was designed to investigate the effect of caffeine from energy drinks on the heartbeat of teenagers.
What part of the experiment was the caffiene from the energy drinks?
a)
independent variable
b)
dependent variable
8.
6. Analyze the graph, how does the amount of food collected (dependent variable) change in relation to the bird's beak size (independent variable)?
a)
The amount of food collected increases linearly with beak size.
b)
The amount of food collected increases with beak size up to a point, then decreases.
c)
The amount of food collected decreases as beak size increases.
d)
The amount of food collected remains constant regardless of beak size.
9.
7. A hypothesis is
a)
a definite answer to a given problem.
b)
a concluding statement.
c)
a proven statement.
d)
a testable possible explanation of an observation.
10.
8. Why are constants used during controlled experiments?
a)
To prevent the experiment from failing by keeping everything identical.
b)
To provide multiple variables for comparison in the experiment.
c)
To ensure that only the independent variable is influencing the results.
11.
9. What is the primary difference between the experimental group and the control group in an experiment?
a)
The experimental group is used to test the hypothesis, while the control group receives no treatment or a standard treatment for comparison.
b)
The experimental group receives the treatment, while the control group is not included in the experiment.
c)
The control group is used to analyze data, while the experimental group is used to collect data.
d)
The control group and experimental group are identical and treated the same in all aspects of the experiment.
12.
10. Select the correct pathway which shows the levels of ecology from most exclusive to least exclusive.
a)
biosphere → community → biome → population → organism → ecosystem
b)
biosphere → biome → ecosystem → community → population → organism
c)
organism → population → community → ecosystem → biome → biosphere
d)
organism → community → population → ecosystem → biome → biosphere
13.
11. All of the following would be considered a biotic factor in terrestrial ecosystems EXCEPT:
a)
amount of rainfall
b)
number of fungi
c)
types of decomposing bacteria
d)
types of plants
14.
12. The definition of community is the same species that can interbreed and they live in the same area at the same time
a)
True
b)
False
15.
13. The definition of ecosystem is a biological community of interacting organisms and their physical environment.
a)
True
b)
False
16.
14. Why is the brown food chain considered just as important as the green food chain?
a)
It produces oxygen for other organisms to breathe
b)
It allows energy to flow from animals to plants
c)
It helps maintain biodiversity by eliminating all predators
d)
It ensures nutrients are returned to the soil to support new growth
17.
Which of the following organisms are key players in the brown food chain?
a)
Herbivores and carnivores
b)
Fungi, bacteria, and earthworms
c)
Producers like grass and algae
d)
Top predators like wolves and eagles
18.
15. What is the primary role of the brown food chain in an ecosystem?
a)
To provide energy directly from the sun to plants
b)
To transfer energy from producers to primary consumers
c)
To recycle nutrients by breaking down dead organisms and waste
d)
To allow predators to hunt more efficiently
19.
16. Which best describes what a food chain shows you?
a)
Energy flow through an ecosystem
b)
Food flowing through an ecosystem
c)
Consumers going into other consumers
d)
Who eats who
20.
17. Where does the energy start in this food chain?
a)
Plant
b)
Sun
c)
Deer
d)
Wolf
21.
18. The Sun has provided the producers of an ecosystem with 11,000,000 kilojoules (kJ) of energy. Based on this information, determine the amount of available energy at the first trophic level of an energy pyramid.
a)
110,000,000 kJ
b)
110,000 kJ
c)
1,100,000 kJ
d)
1,100.00 kJ
e)
11,000,000 kJ
22.
19. The Sun has provided the producers of an ecosystem with 11,382,400 kilojoules (kJ) of energy. Based on this information, determine the amount of available energy at the fourth trophic level of an energy pyramid.
a)
113,824,000 kJ
b)
11,382.40 kJ
c)
1,138,240 kJ
d)
1,138.24 kJ
e)
11,382,400 kJ
23.
20. On the pyramid below, animals that feed on plant eaters are called
a)
Primary consumers
b)
Primary producers
c)
Secondary consumers
d)
Tertiary consumers
24.
21. How much energy is available to the bluetit?
a)
All of the energy in the primary producer level plus the energy in the primary consumer level.
b)
All of the energy in the primary consumer level minus the energy in the primary producer level.
c)
About 10% of the energy from the primary consumer.
d)
About 90% of the energy form the primary consumer.
25.
22. What would result if the spiders were removed from the food web shown?
a)
The competition between snakes, hawks, and owls would decrease.
b)
The number of plants would decrease and number of herbivorous insects would increase.
c)
The number of insectivorous birds and predaceous insects would increase.
d)
The number of hawks, owls, and mice would increase.
e)
The number of toads and foxes would increase.
26.
23. Which of the following organisms would be considered secondary consumers in the food web?
a)
mice and seed-eating birds
b)
insectivorous birds and toads
c)
herbivorous insects and toads
d)
predaceous insects and foxes
27.
24. Which organisms are in the same food chain with the mice?
a)
plants and spiders
b)
foxes and plants
c)
seed-eating birds and hawks
d)
snakes, hawks, and owls
28.
25. An organism that needs to eat other organisms to obtain energy is known as a:
a)
producer
b)
decomposer
c)
consumer
29.
26. These organisms break down dead or decaying organisms is known as a
a)
producers
b)
decomposers
c)
consumers
30.
27. MATH SKILL: If the tropical rain forest annually receives 180 cm of rain, how many centimeters of rain does this biome receive in May if every month gets equal amounts of rain?
a)
3.6 cm
b)
15 cm
c)
18 cm
d)
36 cm
31.
28. According to this diagram, which of these organisms is a primary producer?
a)
pike
b)
algae
c)
mosquito larvae
d)
dragonfly larvae
e)
perch
32.
29. The first link in a food chain is ALWAYS
a)
a consumer
b)
a producer
c)
a decomposer
d)
the sun
33.
30. The first organism link in a food chain is ALWAYS
a)
a consumer
b)
a producer
c)
a decomposer
d)
the sun
34.
31. According to this diagram, which of these organisms is a tertiary consumer?
a)
pike
b)
algae
c)
mosquito larvae
d)
dragonfly larvae
e)
perch
35.
32. The arrows in a food chain or web represents what?
a)
The arrows point to the organism that is being eaten.
b)
The arrrows show how sunlight flows within an ecosystem.
c)
The arrows show the direction of energy flowing between organisms.
d)
The arrows represent how water is transferred from organism to organism within a habitat.
36.
33. What is a trophic level?
a)
A feeding level represented within a food chain or web.
b)
Levels of ecosystems that the world is divided into.
c)
Different levels of nutrients present within an organism.
d)
The levels of sunlight an autotroph needs to survive.
37.
34. How much energy is available to be passed on to the next trophic level in an ecosystem?
a)
90%
b)
70%
c)
10%
d)
0%
38.
35. In the energy pyramid here, which organisms have the most energy available?
a)
producers
b)
herbivores
c)
carnivores
d)
top predators
39.
36. In the energy pyramid here, which organisms have the least energy available?
a)
producers
b)
herbivores
c)
carnivores
d)
top predators
40.
37. Which of the following processes removes carbon dioxide from the atmosphere and converts it to a form of carbon used in the biosphere?
a)
Cellular respiration
b)
Photosynthesis
41.
38. After heavy rainfall, some water flows across the land instead of soaking into the ground. What is this surface movement called?
a)
Percolation
b)
Evaporation
c)
Condensation
d)
Runoff
42.
39. Burning fossil fuel has which effect in the carbon cycle?
a)
It removes carbon dioxide from the atmosphere.
b)
It puts carbon dioxide under the ground.
c)
It adds carbon dioxide to the atmosphere.
d)
It has no effect in the carbon cycle.
43.
40. Look at this diagram, how many ways can carbon enter the atmosphere?
a)
1
b)
2
c)
3
d)
4
e)
5
44.
41. As water travels deeper through layers of soil and rock to reach underground aquifers, which process is taking place?
a)
Transpiration
b)
Infiltration
c)
Runoff
d)
Percolation
45.
42. What is the primary reservoir (storage area) of nitrogen on Earth?
a)
Oceans
b)
Soil
c)
Atmosphere
d)
Living Organisms
46.
43. Which of the following best describes succession?
a)
The reduction in biodiversity of an ecosystem over time.
b)
The changes in species composition in a community over time as species colonize an area.
c)
The evolution of species through natural selection to become different species over time.
d)
The creation of new life from nothing in an ecosystem.
e)
All of these are good descriptions of succession.
47.
44. During primary succession, which organism would likely replace lichens?
a)
Mosses and ferns
b)
Trees
c)
Lichens
d)
Grasses and annual flowers
e)
Bushes and shrubs
48.
45. The first species to colonize an environment is called a
a)
A first order consumer
b)
A primary succession
c)
A pioneer species
d)
A secondary succession
49.
46. What would be the correct sequence of events of secondary succession?
I. An intact ecosystem is disrupted by a natural disaster.
II. Trees become common and outcompete the other plants for sunlight.
III. Bushes begin to dominate.
IV. The climax community of an environment is established again.
V. Pioneer species like grass and flowers grow.
a)
I, II, III, IV, V
b)
I, V, III, II, IV
c)
I, III, IV, V, II
d)
I, II, V, III, IV
50.
47. Which of the following is considered to be a density dependent limiting factor?
a)
Spread of a disease through a population of individuals
b)
Food and nutrient limitation due to a natural disaster
c)
Human activity- building a road, school campus, or airport
51.
48. Which of the following is considered to be a density-independent limiting factor?
a)
Predator- prey relationships
b)
Spread of a disease through a population of individuals
c)
Hurricane
52.
49. Which graph from below best represents a population that has reached its carrying capacity?
a)
A
b)
B
c)
C
d)
D
53.
50. According to the graph, which population is most likely to have an event where many individuals start to die off due to lack of resources.
a)
Population A
b)
Population B
54.
51. What is happening at point E in the graph below?
a)
Stable Equilibrium phase -the population is steady and in balance with the resources available.
b)
Exponential phase- the population is increasing exponentially.
c)
Deceleration phase- growth in population is beginning to slow down due to limiting factors
55.
52. What is happening at point D in the graph below?
a)
Stable Equilibrium phase -the population is steady and in balance with the resources available.
b)
Exponential phase- the population is increasing exponentially.
c)
Deceleration phase- growth in population is beginning to slow down due to limiting factors
56.
53. What is happening at point C in the graph below?
a)
Stable Equilibrium phase -the population is steady and in balance with the resources available.
b)
Exponential phase- the population is increasing exponentially.
c)
Deceleration phase- growth in population is beginning to slow down due to limiting factors
57.
54. If the amount of food, space, water and other resources increases, then the carrying capacity for a population will __________________.
a)
stays the same
b)
increases
c)
decreases
58.
55. Which graph from below best represents exponential population growth?
a)
A
b)
B
c)
C
d)
D
59.
57. Which of these best describes the "induced fit" model of enzyme action?
a)
An enzyme's active site can change shape when binding a substrate to fit it better
b)
An enzyme's active site is perfectly complementary to a substrate like a lock and key
c)
An enzyme's active site changes continuously depending on the environment it is in
d)
An enzyme's active site is fixed and can only bind one type of substrate molecule
60.
58. Which line shows the reaction occurring in the presence of an enzyme?
a)
The solid line
b)
The dashed line
61.
59. "The energy required by the molecules for a reaction to begin is known as the (a) energy." What is the missing word in this sentence? Give your answer as a single word with no period at the end.
62.
60. "When an enzyme's active site has changed shape due to environmental conditions beyond its optimum range, we say the enzyme has been _______________."
a)
deformed
b)
denatured
c)
delayed
d)
decomissioned
63.
61. Which two environmental factors can cause this to occur?
a)
pH (how acidic or basic an environment is)
b)
Salinity
c)
Substrate concentration
d)
Temperature
e)
Enzyme Concentration
64.
62. What is happening at point B?
a)
The substrate concentration has decreased
b)
The enzyme concentration has decreased
c)
The enzyme has become denatured
d)
The pH has fallen too low
65.
63. What is the optimum (best) temperature of this enzyme?
Give your answer as digits (not words) with no period at the end. For example: 18
Do not include units.
(a)
66.
65. Most of the Carbon Dioxide used by plants during photosynthesis comes from
a)
the soil and is absorbed by the plant roots
b)
the carbohydrates stored in the leaves
c)
the atmosphere and enters through the stomata of leaves
d)
the water within the chloroplast
67.
66. What are the products of the Photosynthesis chemical equation?
a)
Carbon dioxide and Glucose
b)
Oxygen and Glucose
c)
Water and Glucose
d)
Sunlight and Glucose
68.
67. What are the reactants of the Photosynthesis chemical equation?
a)
sunlight, carbon dioxide and water
b)
sunlight, oxygen and water
c)
sunlight, carbon dioxide and glucose
d)
sunlight, oxygen, and glucose
69.
68. What is the purpose of photosynthesis?
a)
To convert chemical energy into sunlight
b)
To convert sunlight into the chemical energy of glucose
c)
To maintain cellular structure
d)
To create energy to power reactions only in eukaryotes
e)
To transfer heat energy into chemical energy
70.
69. Which is the correct balanced equation of Photosynthesis?
a)
2 carbon dioxide + 2 water yields 2 glucose and 6 oxygen
b)
4 carbon dioxide + 4 water yields 1 glucose and 6 oxygen
c)
6 carbon dioxide + 6 water yields 1 glucose and 6 oxygen
d)
8 carbon dioxide + 8 water yields 8 oxygen and 0 glucose
71.
70. Science Skill: A diagram representing the relationship between photosynthesis and cellular respiration is shown below.
a)
1- oxygen; 2- carbon dioxide
b)
1- carbon dioxide; 2- oxygen
c)
1- sunlight; 2- water
72.
71. True or False: Plants carry out only photosynthesis and not cellular respiration
a)
True
b)
False
73.
72. True or False: Fermentation and oxidative respiration both take place in anaerobic environments.
a)
True
b)
False
74.
73. The chemical equation below shows the reaction of glucose and oxygen.
a)
Fermentation or Anaerobic Respiration
b)
Photosynthesis
c)
Cellular Respiration or Aerobic Respiration
75.
74. Science Skill: Which of the following trends is supported by the graph looking about how Temperature affects the Rate of Respiration?
a)
As the temperature increases, oxygen consumption increases which increase CR rate.
b)
As the temperature increases, carbon dioxide consumption increases.
c)
As the temperature increases, the respiration rate decreases.
76.
75. Daphne and Aubrey studied an unknown microscopic organism and recoded this information. This organism contains only DNA and a protein coat, and it does not have a cell wall, cell membrane, mitochondria, or ribosomes. What are the Johnson twins most likely studying?
a)
Bacteria
b)
Fungi
c)
Protist
d)
Virus
77.
76. Emma and Andrew studied an unknown microscopic organisms and recoded this information. This organism contains DNA, a cell wall, but does not have a nucleus. What are the students most likely studying?
a)
Bacteria
b)
Fungi
c)
Protist
d)
Virus
78.
77. Which letter in the diagram above indicates the structure that acts like a barrier and is responsible for regulating the movement of materials entering and exiting the cell.
a)
A
b)
B
c)
C
d)
D
79.
78. Which letter in the diagram above indicates the structure that produces ATP energy for the cell?
a)
A
b)
B
c)
C
d)
D
80.
79. Which letter in the diagram above indicates the structure manufactures proteins and then sends them down a transport system (i.e. an intracellular highway for the cell?
a)
A
b)
B
c)
C
d)
D
81.
80. Eli and Hayden studied an unknown microscopic organism and recoded this information. This organism contains DNA, plasmiids, ribosomes, a cell membrane and cell wall. What are they most likely studying?
a)
Bacteria
b)
Fungi
c)
Protist
d)
Virus
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