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Biology Semester 1 Exam

Total questions: 137

Worksheet time: 3hrs 27mins

Name
Class
Date
1.
The part of Earth where organisms can live.
a)
biotic factors
b)
biosphere
c)
ecology
d)
biology
2.
A __________ includes all living and non-living things in an environment. 
a)
population
b)
niche
c)
abitotic
d)
ecosystem
3.
Identify the examples as: a organism, population, community, or ecosystem.
Water, Fish, Turtles, Oxygen, Rocks and Moss interacting in a river system.
a)
Organism
b)
Population
c)
Community
d)
Ecosystem
4.
Identify the examples as: a organism, population, community, or ecosystem.
A beautiful butterfly.
a)
Organism
b)
Population
c)
Community
d)
Ecosystem
5.
Identify the examples as: a organism, population, community, or ecosystem.
Chicken, Cow, Grass, Buffalo, and Mouse living on farmland.
a)
Organism
b)
Community
c)
Population
d)
Ecosystem
6.
All organisms of the same species living in the same area.
a)
Population
b)
Community
c)
Ecosystem
d)
Organism
7.
All of the different biotic organisms found in the same area.
a)
Organism
b)
Population
c)
Community
d)
Ecosystem
8.
Identify the examples as: a organism, population, community, or ecosystem.
All speckled sting-ray that live in the Pacific Ocean
a)
Organism
b)
Population
c)
Community
d)
Ecosystem
9.
The study of organisms and how they interact with one another and their environment is best described as
a)
Biology
b)
Ecology
c)
Zoology
d)
Botany
10.
What level of organization can be seen here?
a)
Species
b)
Population
c)
Community
d)
Ecosystem
11.
TRUE or FALSE: A community includes all abiotic and biotic factors.
a)
TRUE
b)
FASLE
12.
TRUE or FALSE: An ecosystem contains only biotic factors.
a)
TRUE
b)
FALSE
13.
What level of organization can be observed in the image?
a)
Species
b)
Population
c)
Community
d)
Ecosystem
14.
Which is the thin layer of the earth that supports life and also the largest level of ecological organization?
a)
A community
b)
The biosphere
c)
A population
d)
The biome
15.
Which level of ecological organization is composed of many similar ecosystems with the same climate and geographic locations? 
a)
A community
b)
A population
c)
A biome
d)
A biosphere
16.
Which is an example of a biotic factor?
a)
The sun
b)
Water
c)
Grass
d)
Rocks
17.

The Biosphere contains all ecosystems

a)

True

b)

False

18.

Select examples of abiotic things

a)

Soil

b)

Air

c)

Rocks

d)

Water

e)

Animals

19.

Select the examples of biotic things

a)

Plants

b)

Soil

c)

Sun

d)

Animals

20.
An organism that uses an outside source of energy like the sun to create energy-rich food molecules.
a)
Consumer
b)
Producer
c)
Decomposer
d)
Parasite 
21.

Water temperature would be an example of ...

a)

a biotic factor

b)

an abiotic factor

c)

an antibiotic factor

d)

a bacterial factor

22.

The smallest unit of life that can sustain itself is called...

a)

an organism.

b)

the biosphere.

c)

a population.

d)

a community.

23.

What are the levels of ecology from smallest to the largest?

a)

organism, population, community, ecosystem, biosphere

b)

organism, community, population, ecosystem, biosphere

c)

individual, population, community, ecosystem, exosphere.

d)

individual, community, population, ecosystem, exosphere

24.
Andrea is on the grils cross country tream. She is heading out for a run when she comes across 20 Canadian geese.  What level of organization is this group of Canadian geese?
a)
organism
b)
population
c)
community
d)
biome
25.

What is the definition of salinity?

a)

The amount of dissolved oxygen in the water

b)

The amount of sunlight that can penetrate the water

c)

The amount of nutrients available in the water

d)

The amount of salts dissolved in the water

26.

Which zone of an aquatic ecosystem contains enough light for photosynthesis?

a)

Benthic Zone

b)

Aphotic Zone

c)

Photic Zone

d)

Euphotic Zone

27.

What are the major types of marine ecosystems?

a)

Marshes, swamps, and mangrove forests

b)

Oceans/bays, estuaries, coastal wetlands, and coral reefs

c)

Tropical rainforests, deserts, and tundra

d)

Lakes, ponds, and rivers

28.

What are the major types of freshwater ecosystems?

a)

Lakes, ponds, and rivers

b)

Oceans, estuaries, and coastal wetlands

c)

Tropical rainforests, deserts, and tundra

d)

Marshes, swamps, and mangrove forests

29.

What is the function of wetlands?

a)

All of the above

b)

To act as filters for pollutants

c)

To provide habitat for rare species

d)

To reduce the likelihood of floods

30.

How does eutrophication affect aquatic ecosystems?

a)

It increases the oxygen levels in the water

b)

It leads to the decline of fish populations

c)

It promotes the growth of coral reefs

d)

It has no significant impact on aquatic life

31.

What is the difference between freshwater and marine ecosystems?

a)

A marine ecosystem is an aquatic ecosystem with high levels of dissolved salts in the water, freshwater ecosystem have low levels dissolved salts

b)

A freshwater ecosystem is an aquatic ecosystem with high levels of dissolved salts in the water, marine ecosystem have low levels dissolved salts

32.

What is an estuary?

a)

a unique aquatic ecosystem where rivers flow into the open sea

b)

Are ecosystems that are covered with water for at least part of the year.

c)

Ecosystems with high dissolved salts

d)

Ecosystems without trees

33.

What is a wetland?

a)

Ecosystems with low dissolved salts

b)

Are ecosystems that are covered with water for at least part of the year.

c)

Ecosystems with high dissolved salts

d)

Ecosystems without trees

34.

What are biogeochemical cycles?

a)

Allow light energy to pass through the atmosphere, as from the Sun to the ground

b)

Are pathways to stop the movement of matter within ecosystems

c)

  Prevent heat energy from escaping from the ground into space

d)

Are pathways for the movement of matter within ecosystems

35.

What is the difference between the photic and aphotic zone?

a)

Photic zone is has little to no sunlight, the aphotic zone is penetrated by sunlight

b)

Photic zone is penetrated by sunlight, the aphotic zone has little to no sunlight

36.

Which of the following is NOT a terrestrial ecosystem?

a)

desert

b)

deciduous forest

c)

estuary

d)

grassland

37.

An ecosystem that is found on land.

a)

terrestrial ecosystems

b)

grassland

c)

tropical rainforest

d)

deciduous forest

38.

hot, humid forests with much rainfall

a)

grassland

b)

terrestrial ecosystems

c)

rainforest

d)

biodiversity

39.

A terrestrial ecosystem in which many trees lose their leaves each year; it has four seasons.

a)

biodiversity

b)

canopy

c)

tundra

d)

deciduous forest

40.

The variety of different life forms in an ecosystem.

a)

biomes

b)

deciduous forest

c)

biodiversity

d)

grassland

41.

A sandy or rocky terrestrial ecosystem with little precipitation or plant life.

a)

biomes

b)

tundra

c)

biodiversity

d)

desert

42.

Deciduous Forest Plants

a)

maple tree, oak tree, birch tree

b)

deer, squirrel, black bear

c)

acacia trees, baobob trees, scutch grass

d)

hemlock, white spruce, jack pine

43.

are forests where the seasons change. The leaves change color in the autumn and fall off in the winter. Summers are warm and winters are cold.

a)

redwood forest

b)

temperate deciduous forest

c)

seasonal forests

d)

temperate devious forest

44.

Which of the following is NOT an aquatic ecosystem?

a)

Marsh

b)

River

c)

Tundra

d)

Swamp

45.

The ocean is a ___________.

a)

Terrestrial Ecosystem

b)

Aquatic Ecosystem

46.

The temperate forest is a ___________.

a)

Terrestrial Ecosystem

b)

Aquatic Ecosystem

47.

Which of the following ecosystem has a high salinity factor?

a)

River

b)

Ocean

c)

Pond

d)

Lake

48.

What is a producer in an ecosystem?

a)

An animal that eats plants

b)

A plant that makes its own food through photosynthesis

c)

A consumer that eats other animals

d)

A community of different species

49.

What role do decomposers play in an ecosystem?

a)

They produce oxygen

b)

They eat living plants

c)

They break down dead organisms and waste, returning nutrients to the soil

d)

They control the population of producers

50.

A ___________ shows how food chains overlap in an entire ecosystem.

a)

food chain

b)

food web

c)

energy pyramid

51.

________________ are organisms that break down, or decompose, wastes and remains of dead animals and return the nutrients into the food web.

a)

Scavengers

b)

Producers

c)

Consumers

d)

Decomposers

52.

______________ eat only producers.

a)

Herbivores

b)

Omnivores

c)

Carnivores

53.

Organisms that cannot make their own food but eat other living things are called _____________.

a)

producers

b)

consumers

54.

Consumers that eat both plants and animals are

called ___________.

a)

herbivores

b)

omnivores

c)

carnivores

55.

Organisms that eat dead animals and plants are called __________.

a)

consumers

b)

detritivores

c)

decomposers

d)

producers

56.

Which organism is the primary consumer in this food chain?

a)

eagle

b)

plant

c)

mouse

d)

snake

57.

Which organism is the secondary consumer in this food chain?

a)

eagle

b)

plant

c)

mouse

d)

snake

58.

Which organism provides the energy to the primary consumer?

a)

eagle

b)

grasshopper

c)

grass

d)

snake

59.

How much energy is passed from each trophic level to the one above it?

a)

100%

b)

10%

c)

1%

d)

90%

60.

If a plant absorbed 1000 calories of energy in a year, how much energy would be found in a population of herbivores that ate those plants?

a)

1 calorie

b)

1000 calories

c)

100 calories

d)

10 calories

61.

The removal of which creature would have the greatest impact on this food web?

a)

Frog

b)

Flowering plant

c)

Python

d)

Grasshopper

62.

In which type of symbiotic relationship do both species benefit (+,+) ?

a)

Commensalism

b)

Parasitism

c)

Mutualism

d)

Predation

63.

In which type of symbiotic relationship does one species benefit while the other species is not affected (+, 0)?

a)

Commensalism

b)

Parasitism

c)

Mutualism

d)

Predation

64.

In which type of symbiotic relationship does one species benefit while the other species is harmed (+,-)?

a)

Commensalism

b)

Parasitism

c)

Mutualism

d)

Predation

65.
Cattle egrets are birds that forage in fields among cattle. The egrets get easy access to food and the cattle don't care if they are there or not.
a)
mutualism
b)
commensalism
c)
competition
d)
parasitism
66.
Yucca flowers are pollinated by yucca moths. The moths lay their eggs  in the flowers where  the larvae hatch and eat some of the developing seeds. Both species benefit.  
a)
Mutualism 
b)
Parasitism 
c)
Commensalism 
67.

An organism capable of making its own food molecules using sunlight for energy.

a)

Autotroph

b)

Heterotroph

68.

Which of the following is NOT a process in the water cycle?

a)

Transpiration

b)

Denitrification

c)

Condensation

d)

Evaporation

69.

What is the major environmental concern associated with the increase in carbon dioxide in the atmosphere?

a)

Air pollution

b)

Climate change

c)

Ocean acidification

d)

Deforestation

70.

How is carbon dioxide removed from the atmosphere?

a)

Through weathering

b)

Through respiration

c)

Through photosynthesis

d)

Through combustion

71.

What is the primary way nitrogen enters living organisms?

a)

Through volcanic activity

b)

Through the soil

c)

Through the atmosphere

d)

Through the ocean

72.

Which of the following is NOT a process in the nitrogen cycle?

a)

Nitrification

b)

Denitrification

c)

Transpiration

d)

Nitrogen fixation

73.

What happens during condensation in the hydrologic cycle?

a)

Water turns from a gas into a liquid

b)

Water turns from a liquid into a gas

c)

Water turns from a solid into a gas

d)

Water turns from a gas into a solid

74.

What happens during evapotranspiration?

a)

Plants absorb water through their roots

b)

Water evaporates from the surface of the ocean

c)

Water condenses into clouds

d)

Water freezes into ice

75.

What is the carbon cycle?

a)

The movement of carbon through different ecosystems

b)

The process of carbon dioxide turning into oxygen

c)

The cycle of carbon turning into diamonds

d)

The movement of carbon through the atmosphere

76.

What is the main source of carbon dioxide in the atmosphere?

a)

Burning fossil fuels

b)

Volcanic eruptions

c)

Photosynthesis

d)

Respiration by animals

77.

An organism that is not native (from) a particular ecosystem.

a)

invasive species

b)

biodiversity

78.

variety of life

a)

invasive species

b)

biodiversity

79.

Complete the sentence:

An invasive species eat native prey, which ___________ food available for active predators.

a)

decrease

b)

increase

c)

does not affect

80.

An invasive species overpopulates an area and kills off native species, which causes an increase in biodiversity.

a)

True

b)

False

81.

Why don't populations grow indefinitely?

a)

limiting factors

b)

only biotic factors

c)

only abiotic factors

d)

none of the above

82.

What is the arrow pointing at?

a)

carrying capacity

b)

biotic potential

c)

density-independent

d)

density dependent

83.

Parasites, disease, and predators, are examples of what type of limiting factors?

a)

density dependent

b)

density independent

c)

survivorship

d)

type 1 curve

84.

What does the carrying capacity mean?

a)

The number of individuals an area can carry

b)

the number of births

c)

The number of deaths an area has

d)

not sure

85.

Emigration is

a)

the movement out of an area

b)

the movement into an area

c)

movement in and out of an area

d)

migration

86.
When a population grows past the ecosystem's carrying capacity, what happens to the population?
a)
Continues to grow
b)
The population starts to die off to return to carrying capcity
c)
The population will go extinct due to lack of resources
d)
The population grows then finds a new carrying capacity
87.
Which of the following would INCREASE the carrying capacity of an ecosystem?
a)
increase in predators
b)
disease
c)
increase in available food
d)
drought
88.

Which letter shows exponential growth happening?

a)

A

b)

B

c)

C

d)

D

89.

This graph shows ________?

a)

exponential growth.

b)

logistic growth.

90.
Which limiting factor is independent of the number of individuals in a population?
a)
competition
b)
parasitism/disease
c)
stress
d)
natural disasters
91.
If the number of births in a population is the same as the number of deaths in a population, what will happen to the growth of the population?
a)
It will increase.
b)
It will decrease.
c)
It will stay the same.
d)
It will fluctuate.
92.
What type of growth is represented behind?
a)
exponential
b)
logistics
c)
a good kind
d)
representative
93.
What two elements make up water?
a)
Helium and oxygen
b)
Hydrogen and oxygen
c)
helium and carbon
d)
oxygen and carbon
94.
What word describes when water is attracted to other substances?
a)
cohesion
b)
adhesion
c)
capillary action
d)
surface tension
95.
Attractions between the negative Oxygen atom of one water molecule and the positive Hydrogen atom of another water molecule are called
a)
Covalent bonds
b)
Ionic bonds
c)
Polar bonds
d)
Hydrogen bonds
96.
Which end of the water molecule has a slightly positive charge?
a)
the oxygen end
b)
the hydrogen end
c)
both ends are slightly positive
d)
neither end is positive
97.
Water is a universal solvent because it...
a)
It can be found anywhere
b)
It freezes when it gets cold
c)
floats when frozen
d)
Dissolves most substances
98.
Which of the following is LEAST likely to dissolve in water?
a)
nonpolar fats and oils
b)
polar sugar molecules
c)
salt made of a positive sodium ion and a negative chloride ion
d)
all of the substances will dissolve easily in water
99.
Large bodies of water, such as lakes and oceans, do not quickly fluctuate in temperature. What is the reason for this phenomenon?
a)
Water is an acid.
b)
Water is a versatile solvent.
c)
Water has a high heat capacity.
d)
 Water acts as a buffer.
100.
 Small insects can walk across the surface of calm water. Their feet push the surface of the water down slightly, somewhat like a person walking across a trampoline, but they do not break the surface. What is the best explanation for why this happens?
a)
The insects are light enough so that they do not break the hydrogen bonds holding the water molecules together
b)
The insects actually use their wings to hover slightly above the water's surface and they only skim it with their feet
c)
The insects' feet are non-polar, so they are repelled by the polar water molecules and are pushed away from the water's surface
d)
The insects are small enough to see the individual water molecules, so they are able to step carefully from one molecule to the next
101.
The fact that ice floats on liquid water is due to the fact that water's solid is ___________ than it's liquid form
a)
less polar
b)
more polar
c)
less dense
d)
more dense
102.
The tightness across the surface of water that enables paper clips to float is ____________.
a)
adhesion
b)
capillary action
c)
surface tension
d)
polarity
103.
Which statement explains why water molecules stick together?
a)
both sides are negative
b)
one side has a positive charge and the other side has a negative charge
c)
one side has a negative charge adn the other side has a neutral charge
d)
both sides are positive
104.
When a molecule has an opposite electrical charge on each end, it is known as what?
a)
cohesion
b)
polar molecule
c)
hydrogen bond
d)
solution
105.
When water molecules stick easily to other water molecules, this is called what?
a)
cohesion
b)
adhesion
c)
solution
d)
polar molecule
106.
Which Biomolecule is the main source of quick energy?
a)
Carbohydrates
b)
Lipids
c)
Proteins
d)
Nucleic Acids
107.
Which biomolecule releases energy slowly?
a)
Carbohydrates
b)
Lipids
c)
Proteins
d)
Nucleic Acids
108.
Which biomolecule forms bones, muscles, hair and nails?
a)
Carbohydrates
b)
Lipids
c)
Proteins
d)
Nucleic Acids
109.
This molecule is made of glycerol and fatty acids.
a)
Carbohydrates
b)
Lipids
c)
Proteins
d)
Nucleic Acids
110.
Which biomolecule group do enzymes belong in?
a)
Carbohydrates
b)
Lipids
c)
Proteins
d)
Nucleic Acids
111.
Which biomolecule stores and transmits genetic information?
a)
Carbohydrates
b)
Lipids
c)
Proteins
d)
Nucleic Acids
112.
Which Biomolecule is pictured below?
a)
Carbohydrates
b)
Lipids
c)
Proteins
d)
Nucleic Acids
113.
What biomolecule do enzymes belong to? 
a)
Carbohydrate
b)
Lipid
c)
Nucleic Acid
d)
Protein
114.
Which biomolecule is found in fats, oils, and waxes and is a source of long-term energy? 
a)
Proteins
b)
Nucleic Acid
c)
Lipids
d)
Carbohydrate
115.
Which biomolecule is this a picture of?
a)
Protein
b)
Nucleic Acid
c)
Lipid
d)
Carbohydrate
116.
Which biomolecule is this a picture of?
a)
Protein
b)
Nucleic Acid
c)
Lipid
d)
Carbohydrate
117.

Which biomolecule is made of nucleotides and contain your DNA?

a)
Carbohydrate
b)
Lipids
c)
Protein
d)
Nucleic Acid
118.
What elements are common to all 4 biomolecules?
a)
Carbon, hydrogen, nitrogen
b)
Carbon, Nitrogen, Phosphorus
c)
Carbon, Hydrogen, Oxygen
d)
Carbon, Hydrogen, Phosphorus
119.
Why are macromolecules also known as "polymers?"
a)
They are large molecules made up of many monomers. 
b)
They are large molecules added together. 
c)
There are many types of macromolecules. 
d)
Many organisms have macromolecules.
120.
Which of the following is NOT a biological macromolecule?
a)
Water
b)
Lipid
c)
Carbohydrate
d)
Nucleic Acid
121.
All biological macromolecules are organic, meaning they have ________ and hydrogen bonds.
a)
Carbon
b)
Hydrogen
c)
Nitrogen
d)
Oxygen
122.
True or False: The building blocks of macromolecules are also known as "monomers".
a)
True
b)
False
123.
What are the monomers (building blocks) of CARBOHYDRATES?
a)

Monosaccharides/Glucose (simple sugars)

b)
Amino Acids
c)
Nucleotides
d)
Triglycerides/No true monomer
124.
What are the monomers (building blocks) of PROTEINS?
a)
Monosaccharides (simple sugars)
b)
Amino Acids
c)
Nucleotides
d)
Triglycerides/No true monomer
125.
What are the monomers (building blocks) of NUCLEIC ACIDS?
a)
Monosaccharides (simple sugars)
b)
Amino Acids
c)
Nucleotides
d)
Triglycerides/No true monomer
126.
What is a substance called if it speeds up a chemical reaction?
a)
reusable
b)
catalyst
c)
specific
d)
fragile
127.
With what 3 letters do enzymes typically end?
a)
-ose
b)
-ase
c)
-ese
d)
-tic
128.
Letter D...
a)
active site
b)
enzyme
c)
substrate
d)
products
129.
Letter B...
a)
active site
b)
enzyme
c)
substrate
d)
products
130.
Letter C...
a)
active site
b)
enzymes
c)
substrate
d)
products
131.
Letter E...
a)
active site
b)
enzyme
c)
substrate
d)
products
132.
An enzyme speeds up a reaction by
a)
lowering the activation energy.
b)
raising the activation energy.
c)
releasing energy.
d)
absorbing energy.
133.

What happens when enzymes are heated to a high temperature?

a)

The enzymes die.

b)

The shape of the enzyme are changed and it denatures

c)

The enzymes' amino acid sequence changes.

d)

The enzymes remain the same

134.

Which of these is most likely an enzyme?  

a)

Sucrose

b)

Galactose

c)

Fructose

d)

Amylase

135.

What is the optimum temperature for this enzyme?

a)

20 degrees Celsius

b)

45 degrees Celsius

c)

52 degrees Celsius

d)

64 degrees Celsius

136.

What can be inferred using the graph?

a)

Cells can function equally as well at all pH values.

b)

Cells do not function well at pH values that are too high or too low.

c)

Cells function best at high pH values.

d)

Cells function best at low pH values.

137.

In the enzymatic reaction, the __________ is on the left of the arrow, while the products are to the right of the arrow.

a)

enzyme

b)

filtrate

c)

pre-product

d)

reactant

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