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Unit 7a Ecology Review

Total questions: 115

Worksheet time: 2hrs 15mins

Name
Class
Date
1.

All of the squirrels, grass, oak trees, and turtles in a forest would be considered a

a)

community.

b)

habitat.

c)

population.

d)

species.

2.
All ecosystems are home to living beings that do NOT  interact with each other. True or False?
a)
True 
b)
False
3.
Decomposers are very important in an ecosystem because they break down dead organisms.  True or False?
a)
True
b)
False
4.
What do we call the non-living part of the environment?
a)
Biotic
b)
Population
c)
Abiotic
d)
Antibiotic
5.
What do we call several different populations interacting in some way?
a)
Population
b)
Community
c)
Ecosystem
d)
Biome
6.
The study of how living things interact with their environment and abiotic factors is the study of ____________________.
a)
Astrology
b)
Microbiology
c)
Ecology
d)
Geology
7.
How can abiotic factors change in an ecosystem?
a)
Flooding
b)
Forest fires
c)
drought
d)
All of the above
8.
What is it called when water vapor cools and changes into a liquid?
a)
condensation
b)
respiration
c)
precipitation
d)
evaporation
9.
Which of the following is NOT a stage of the nitrogen cycle?
a)
organisms breathe in nitrogen gas
b)
organisms release nitrogen compounds via waste or decomposition
c)
bacteria convert unusable nitrogen to usable nitrogen
d)
plants absorb nitrogen compounds from the soil
10.
The three steps of the water cycle include:
a)
condensation, precipitation, filtration
b)
filtration, irrigation, evaporation
c)
precipitation, condensation, evaporation
d)
precipitation, filtration, evaporation
11.
Which of the following is NOT part of the carbon cycle?
a)
condensation
b)
photosynthesis
c)
combustion
d)
respiration
12.
Which of these is the greatest cause of harmful levels of carbon in the atmosphere?
a)
respiration
b)
combustion
c)
photosynthesis
d)
decomposition
13.

What converts nitrogen gas into a usable form for plants and animals?

a)

bacteria

b)

rain

c)

fungi

d)

car exhaust

14.

Organisms that need nitrogen to survive.

a)

only plants

b)

only animals

c)

only bacteria

d)

all living things

15.

How is nitrogen "fixed" into a usable form for plants?

a)

Through action of bacteria only

b)

Through lightning only

c)

Through action of bacteria and lightning

d)

Through photosynthesis

16.

Gas that makes up 78% of our atmosphere.

a)

Oxygen

b)

Nitrogen

c)

Hydrogen

d)

Carbon Dioxide

17.
The living portions of the ecosystem.
a)
Biotic factors
b)
Abiotic factors
18.
Members of a species in a defined area
a)
Ecosystem
b)
community
c)
biodiversity
d)
population
19.
Which of the following is NOT a criteria for life?
a)
response to environment
b)
Growth
c)
Reproduce
d)
Breathes
20.
Which of the following is non-living
a)
bacteria
b)
cloud
c)
fungus
d)
dog
21.
Which of the following is uni-cellular
a)
bacteria
b)
dog
c)
tree
d)
crab
22.
When a single organism produces offspring without the aid of another organism, this is ____________
a)
sexual reproduction
b)
growth
c)
development
d)
asexual reproduction
23.
The simplest form of life is the ______
a)
cell
b)
species
c)
organism
d)
stimulus
24.
All organisms are made of _____
a)
water
b)
cells
c)
organs
d)
tissues
25.

Reproduction that involves two cells from different parents unite to produce the first cell of a new organism.

a)

Asexual

b)

Sexual

c)

Budding

d)

Division

26.

Reproduction that only involves one parent and all offspring are identical; for example, binary fission of bacteria or amoebas.

a)

Asexual

b)

Sexual

c)

Division

d)

Addition

27.

The combination of chemical reactions through

which an organism builds up or breaks down

materials as it carries out its life processes is called ...

a)

absorption

b)

metabolism

c)

digestion

d)

consumption

28.

A stimulus can be external or internal.

a)

False

b)

True

29.

Maintaining a stable internal

environment is called

a)

homeostasis

b)

equilibrium

c)

balance

d)

evenness

30.
A baby song bird hatches from its egg with both parent songbirds watching.
a)
All living things reproduce
b)
All living things maintain homeostasis
c)
All living things use energy
d)
All living things grow
31.
A camel has eyelashes that work to keep the dust and sand out of its eyes.
a)
All living things adapt to their environment
b)
All living things grow
c)
All living things have cells
d)
All living things use energy
32.
Rocks are not living because
a)
they never move
b)
they aren't needed for humans
c)
they are not made of cells
d)
they don't break down
33.
A worm turns away from light is an example of a worm
a)
reproducing
b)
doing cellular respiration
c)
having cells
d)
responding to its environment
34.
A _____ is something in the environment that causes an organism to respond.
a)
stimulus
b)
response
c)
cause
d)
effect
35.
It is hot outside. You start sweating. In this case, the hot weather is the...
a)
stimulus
b)
response
c)
cause and effect
d)
responder
36.
When a baby kitten becomes an adult cat, this is an example of...
a)
energy metabolism
b)
growth and development
c)
response to stimuli
d)
having cells
37.
A plant growing towards the light is an example of 
a)
reproduction.
b)
responding to a stimuli.
c)
metabolism.
d)
homeostasis.
38.
 All organisms contain instruction molecules that help determine which traits the organism will have is an example of 
a)
universal genetic code (DNA/RNA)
b)
metabolism
c)
evolution
d)
growth and development
39.
Which of the following organisms are LEAST closely related?
a)
organisms that share a domain
b)
organisms that share a family 
c)
organisms that share a genus 
d)
organisms that share a species 
40.
The scientific name for an organism is made from the:
a)
class and family name
b)
genus and species name
c)
domain and kingdom name
d)
kingdom and phylum name
41.
The 8 levels of classification, most broad to most specific.
a)
Domain, Genus, Family, Order, Class, Phylum, Kingdom, Species
b)
Domain, Species, Kingdom, Genus, Phylum, Family, Class, Order
c)
Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species
d)
Order, Kingdom, Species, Domain, Phylum, Family, Class, Genus
42.
Term given to describe the 2 name naming system is:
a)
dichotmous key
b)
binomial nomenclature
c)
2 scientific names
d)
binomial key
43.
Who first proposed binomial nomenclature as a way of classifying organisms?
a)
Carl Linnaeus
b)
Carl's Jr.
c)
Charles Darwin
d)
Henry Groseclose
44.
Which organisms are most closely related?
a)
Equus caballas (Horse) & Equus burchellii (Zebra)
b)
Cyanea artica (Jellyfish) &
Ctenodiscus crispatus (Mud Starfish)
c)
Naja naja (cobra) & Glycine max (soya bean)
d)
Ophiocomina nigra (black brittle star) & Brassica nigra (black mustard)
45.
The science of describing, classifying, and naming living things is called:
a)
Geology
b)
Biology
c)
Taxonomy
d)
Chemistry
46.
A tool used by a taxonomist to identify an unknown organism is known as a __________.
a)
dichotomous key
b)
binomial nomenclature
c)
scientific name
d)
binomial key
47.
What is the purpose of a dichotomous key?
a)
to find a common ancestor
b)
to show the evolution of organisms
c)
to show relationships between organisms
d)
to identify organisms
48.
What step do we always start with when using dichotomous keys?
a)
1
b)
2
c)
3
d)
4
49.
When using a dichotomous key to identify organisms, what do we look at?
a)
physical features
b)
weather patterns
c)
environment
d)
diet
50.
A student discovers an arachnid with a segmented abdomen, long legs, and a tail with no stinger. The student uses the dichotomous key below to identify it. Which arachnid has the student found?
a)
Whip Scorpion
b)
Wind Scorpion
c)
Daddy long legs
d)
Scorpion
51.
According to this cladogram, sharks are MOST closely related to which organism? 
a)
Amphibians
b)
Ray finned fish
c)
Crocodiles
d)
Birds
52.
Which of the following is the most simple level of ecological organization?
a)
A community
b)
An individual or species
c)
A population
d)
An ecosystem
53.
TRUE or FALSE: A community includes all abiotic and biotic factors.
a)
TRUE
b)
FASLE
54.
TRUE or FALSE: An ecosystem contains only biotic factors.
a)
TRUE
b)
FALSE
55.
What level of organization can be observed in the image?
a)
Species
b)
Population
c)
Community
d)
Ecosystem
56.
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
57.
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
58.
Which is an example of an abiotic factor?
a)
Grass
b)
Trees
c)
Rain
d)
Birds
59.
Example of a decomposer
a)
fungus
b)
mouse
c)
plants
d)
frogs
60.

Choose the biological process(es) below that is/are involved in one or more of the geochemical cycles.

a)

Transpiration

b)

Erosion

c)

Nitrogen fixation by bacteria

d)

Animals excreting waste into water

61.

Carbon dioxide (CO2) is returned to the atmosphere primarily by

a)

Consumption

b)

Combustion and cellular respiration

c)

Waste elimination

d)

Photosynthesis

62.

Which of the following is/are a part of the carbon cycle? (Choose all that apply)

a)

Photosynthesis

b)

Transpiration

c)

Burning of fossil fuels

d)

Decomposition of plants and animals

63.

Nitrogen fixation is primarily performed by

a)

Humans

b)

Plants

c)

Animals

d)

Bacteria

64.

Which process in the water cycle requires a living organism in order for it to occur?

a)

Transpiration

b)

Condensation

c)

Evaporation

d)

Precipitation

65.

Which of these organisms is involved in the carbon cycle? Which step is it involved in? What is happening during this process with this organism?

a)

Plants; transpiration; water released by plant re-enters atmosphere

b)

Humans; combustion; burning of different carbon rich materials including fossil fuels

c)

Bacteria; nitrogen fixation, ammonification, nitrification, denitrification; convert atmospheric N to usable N, convert N to ammonia, etc.

d)

Never uses living organisms; no process; no description

66.

Which of these organisms is involved in the water cycle? Which step is it involved in? What is happening during this process with this organism?

a)

Plants; transpiration; water released by plant re-enters atmosphere

b)

Humans; combustion; burning of different carbon rich materials including fossil fuels

c)

Bacteria; nitrogen fixation, ammonification, nitrification, denitrification; convert atmospheric N to usable N, convert N to ammonia, etc.

d)

Never uses living organisms; no process; no description

67.

Which of these organisms is involved in the nitrogen cycle? Which step is it involved in? What is happening during this process with this organism?

a)

Plants; transpiration; water released by plant re-enters atmosphere

b)

Humans; combustion; burning of different carbon rich materials including fossil fuels

c)

Bacteria; nitrogen fixation, ammonification, nitrification, denitrification; convert atmospheric N to usable N, convert N to ammonia, etc.

d)

Never uses living organisms; no process; no description

68.

Humans cannot impact the carbon cycle.

a)

True

b)

False

69.

Humans impact the water cycle by developing the land. (Adding cement and other ground overs)

a)

True

b)

False

70.

Humans can impact the nitrogen cycle by using fertilizers excessively.

a)

True

b)

False

71.

The 6 steps to the water cycle are:

a)

condensation; evaporation; transpiration; runoff; infiltration; precipitation

b)

decomposition; condensation; evaporation; runoff; infiltration; precipitation

c)

nitrogen fixation; condensation; evaporation; transpiration; runoff; precipitation

d)

condensation; decomposition; evaporation; transpiration; precipitation; assimilation

72.
What is it called when plants give off water vapor as a waste product?
a)
condensation
b)
evaporation
c)
sublimation
d)
transpiration
73.
Which stage does the #2 show in the diagram?
a)
condensation
b)
evaporation
c)
precipitation
d)
run off
74.
Which stage does the #3 show in the diagram?
a)
condensation
b)
evaporation
c)
precipitation
d)
run off
75.
what does the #4 show in the diagram?
a)
condensation
b)
evaporation
c)
precipitation
d)
run off
76.
What part of the water cycle does this picture show?
a)
condensation
b)
precipitation
c)
evaporation
77.
Which of these is an example of precipitation?
a)
snow
b)
air
c)
clouds
d)
vapor
78.
What is is called when water turns into a vapor?
a)
EVAPORATION
b)
PRECIPITATION
c)
TRANSPIRATION
79.
After precipitation occurs, what can the water do?
a)
It will infiltrate the ground or runoff.
b)
It will freeze and melt.
c)
It will evaporate
d)
Nothing will happen to it.
80.
How nitrogen is "fixed" into useable form for plants...
a)
through action of bacteria only
b)
through lightning only
c)
through action of bacteria & lightning
d)
through photosynthesis
81.
Organisms that break down dead plants & animals and release nitrogen back into atmosphere...
a)
bacteria
b)
plants
c)
animals
d)
producers
82.
Which one of these does not add CO2 to the atmosphere?
a)
cooking with gas
b)
planting trees
c)
burning wood
d)
riding in a bus
83.
What does not produce carbon dioxide?
a)
Photosynthesis
b)
Burning Fossil Fuels
c)
Animal respiration
d)
Plants decaying
84.
How do living organisms return carbon to the atmosphere in the carbon cycle?
a)
respiration and photosynthesis
b)
 decomposition and respiration
85.
4. Fossil fuels came from the fossilized remains of plants and animals from long ago.
a)
True
b)
False
86.
5. The Earth provides humans with an unlimited amount of fossil fuels. They are considered renewable.
a)
True
b)
False
87.
What type of growth is shown in the diagram?
a)
exponential growth
b)
logistic growth 
c)
predator-prey cycle
d)
boom-bust curve
88.
Largest number of individuals of a population that the environment can support...  
a)
carrying capacity
b)
population crash
c)
lag phase
d)
mutualism
89.
What is the carrying capacity for this sheep population?
a)
1.8 million
b)
1.25 million
c)
1.6 million
d)
1.o million
90.

Type of growth occurs when disease and parasites are present...

a)

exponential

b)

J-shaped

c)

predator-prey

d)

logistic

91.
What is the carrying capacity of this population?
a)
100
b)
200
c)
300
d)
400
92.
What is the carrying capacity of this population?
a)
100
b)
200
c)
300
d)
400
93.
What point on the graph represents the carrying capacity?
a)
A
b)
B
c)
C
d)
D
94.
Will competition increase/decrease the carrying capacity of an ecosystem for the animal in competition?
a)
Decrease
b)
Increase
95.
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
96.
Which definition best matches the term population density?
a)
human beings in general
b)
number of people in a particular area
c)
A measurement of people for a specific area
d)
All the inhabitants of a particular area
97.

Food, water, sunlight, air, soil are resources that are often __________.

a)

limiting factors

b)

wet

c)

messy

d)

found in rocks

98.

If there is more food than usual in an ecosystem, then...

a)

Populations will stay the same

b)

Populations will decrease

c)

Populations will increase

99.

What would happen if the population of hawks suddenly increased? How would it affect the other organisms in the ecosystem?

a)

The snakes would decrease due to more hawks eating them

b)

All of the population of organisms would increase

c)

The biotic factors in the ecosystem would increase

d)

The hawks predators would decrease

100.
If the birth rate is _________ than the death rate then the population will ____________.
a)
Greater/Increase
b)
Greater/Decrease
101.
If the death rate is ______ than the birth rate then the population will ____________.
a)
Greater/Increase
b)
Greater/Decrease
102.
Occurs when organisms MOVE in from another environment.
a)
Immigration
b)
Emmigration
103.
Occurs when part of the population LEAVES the environment
a)
Immigration
b)
Emmigration
104.

Many fish die due to a drastic change in water temperature.

a)

Density-Dependent

b)

Density-Independent

105.

An extensive drought in the plains threatens wildebeest, giraffe, zebra, and springbok populations.

a)

Density-Dependent

b)

Density-Independent

106.

Which of the following is a density-dependent limiting factor?

a)

human activities

b)

unusual weather

c)

competition

d)

natural disaster

107.
Which of the following is a density-independent limiting factor?
a)
natural disaster
b)
predation
c)
disease
d)
parasitism
108.

Which of the following would NOT be an example of a density dependent limiting factor?

a)

fire

b)

disease

c)

lack of food

d)

space

109.

Which of the following would NOT be an example of a density independent factor?

a)

predation

b)

tornado

c)

hurricane

d)

fire

110.

Which of the following are examples of a density independent factors?

a)

forest fire

b)

seasonal cycles

c)

storms

d)

disease

111.

Which of the following are density dependent factors?

a)

competition for resources

b)

predation

c)

disease

d)

natural disasters

112.

What would human alterations of the environment be considered? Ex. Cutting down the rain forests

a)

Density-independent

b)

Density-dependent

113.
_____ is the conversion of organic nitrogen into ammonia
a)
Nitrogen Fixation
b)
Ammonification
c)
Denitrification
d)
Assimilation 
114.

What process occurs when dead plant and animal matter decomposes and nitrogen is released back into the atmosphere?

a)

Assimilation

b)

Fixation

c)

Ammonification

d)

Denitrification

115.

A correct path that nitrogen could take would be

a)

air -> animals -> plants -> bacteria

b)

animals -> air -> bacteria -> plants

c)

bacteria -> air -> plants -> animals

d)

air -> bacteria -> plants -> animals

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