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Review Unit 2 Ecology

Total questions: 60

Worksheet time: 2hrs 30mins

Name
Class
Date
1.

What level of organization can be seen here?

a)

Species

b)

Population

c)

Community

d)

Ecosystem

2.

A collection of living organisms that belong to different populations but all live in the same area and interact with one another is a...

a)

Population

b)

Ecosystem

c)

Community

d)

Ecosphere

3.

Which of the following examples is an abiotic factor?

a)

People

b)

Animals

c)

Plants

d)

Water

4.

Which of the following examples is an abiotic factor?

a)

Maple Tree

b)

Cat

c)

Sunlight

d)

Bacteria

5.

Which of the following examples is a biotic factor?

a)

Soil

b)

Lava

c)

Fungus

d)

Clouds

6.
All of the living and non-living things in an environment are called an _______________. 
a)
population
b)
niche
c)
abitotic
d)
ecosystem
7.
The biotic factors in this image are ____________________.
a)
frog, snail, water
b)
frog, fish, air
c)
frog, tadpoles, fish
d)
frog, tadpoles, sun
8.
The abiotic factors in this image are ________________.
a)
frog, water, sun
b)
air, water, snail
c)
air, sun, water weeds
d)
air, sun, water
9.
The water cycle has
a)
a beginning and an end. 
b)
no beginning an no end. 
c)
only a beginning. 
d)
only an end. 
10.
During which stage do clouds form?
a)
condensation
b)
evaporation
c)
precipitation
11.
What is it called when plants give off water vapor as a waste product?
a)
condensation
b)
evaporation
c)
sublimation
d)
transpiration
12.
Snow, sleet, hail, and rain are all examples of  ________________. 
a)
evaporation
b)
condensation
c)
accumulation
d)
precipitation
13.
oxygen is a gas produced by _ and used by  _ 
a)
plants and animals 
b)
photosynthesis and carbon dioxide 
c)
animals and plants 
d)
carbon dioxide and photosynthesis
14.
Combustion is another word for __________.
a)
Transportation
b)
Respiration
c)
Fossil Fuels
d)
Burning
15.
Organisms that do not decompose can be buried and become what?
a)
water
b)
nutrients
c)
air
d)
fossil fuels
16.

When organisms die, what process returns their carbon back into the atmosphere?

a)

Respiration

b)

Decomposition

c)

Combustion

d)

Erosion

17.

Which form of carbon is the most potent greenhouse gas?

a)

CO2

b)

CH4

c)

C6H12O6

d)

C3H8O3

18.

Organisms need nitrogen in order to...

a)

To breathe

b)

To obtain water for growth

c)

To build proteins & DNA

d)

To regulate temperature

19.

Gas that makes up 78% of our atmosphere.

a)

Oxygen

b)

Nitrogen

c)

Hydrogen

d)

Carbon Dioxide

20.
Plants and animals cannot use nitrogen directly from the air.
a)
True
b)
False
21.

Bacteria fix nitrogen from the atmosphere into a form plants can use.

a)

True

b)

False

22.
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
23.

How does fertilizer affect the ecosystem?

a)

the bacteria reproduce quicker

b)

causes increase in rain, thereby increasing flooding of ponds and lakes

c)

create large algae blooms in the water

d)

cause the nitrogen fixing bacteria in the soil to be more productive

24.

How do animals get the nitrogen they need?

a)

From the air they breathe

b)

From the water they drink

c)

From the food they eat

d)

From the sun

25.

According to this diagram, plants absorb

a)

nitrates

b)

nitrogen fixing bacteria

c)

animals

d)

decomposers

26.

What is the process where plants use nitrates to grow?

a)

Nitrogen Fixation

b)

Ammonification

c)

Assimilation

d)

Nitrification

27.

What is the process where bacteria turns Nitrogen gas from the atmospheres into usable compounds?

a)

nitrogen composition

b)

nitrogen fixation

c)

ammonia

d)

denitrification

28.

_____ is the conversion of organic nitrogen into ammonia

a)

Nitrogen Fixation

b)

Ammonification

c)

Denitrification

d)

Assimilation

29.

The process that convert nitrates (NO3-) back to nitrogen gas (N2) there by replenishing N2 in the atmosphere is called

a)

Nitrogen fixation

b)

Deamination

c)

Denitrification

d)

Nitrification

30.

This is NOT a part of the phosphorus cycle.

a)

Phosphate is incorporated into sedimentary rocks

b)

Phosphate bound to soil

c)

Atmospheric phosphate

d)

Phosphate is absorbed from the soil by plants

31.
_____ brings phosphorous into our waterways. .
a)
precipitation
b)
runoff
c)
transpiration
d)
condensation
32.

What is the carrying capacity of the graph?

a)

around 500

b)

more than 800

c)

less than 300

d)

around 700

33.

What happens if a population grows past its carrying capacity?

a)

The population keeps growing

b)

The population starts to die off

c)

The entire species will go extinct

d)

The carrying capacity just increases

34.
What role do decomposers play in the phosphorous cycle?
a)
absorb phosphorous 
b)
release phosphorous into atmosphere
c)
return phosphorous into the soil
d)
combustion
35.

A series of progressive changes in the composition of an ecological community over time

a)

Climax Community

b)

Primary Succession

c)

Ecological Succession

d)

Species Richness

36.

newly exposed or newly formed rock is colonized by living things for the first time. Certain hardy plants and lichens with few soil requirements, called pioneer species, colonize the area first.

a)

Climax community

b)

Primary succession

c)

Ecological succession

d)

Secondary succession

37.

Primary succession occurs in an area that has:

a)

Has Soil

b)

Has No Soil

c)

Has Some Soil

d)

none of these

38.

What is an example of an area that is likely to undergo primary succession?

a)

Glaciers melt and leave exposed rock

b)

Plants die from drought and decompose

c)

Land is bulldozed and soil remains

39.
What are examples of pioneer species in a primary succession?
a)
Bushes and Shrubs
b)
Oak trees
c)
Mossess and Lichens 
d)
A rose Bush
40.

After a volcanic eruption, volcanic rock is present (but no soil). Which of the following states the most likely order of succession that would be seen?

a)

Lichens → Shrubs → Grasses → Trees

b)

Lichens → tree → shrubs→Grasses

c)

Grasses → Lichens → Shrubs → Trees

d)

Lichens → Grasses → Shrubs → Trees

41.

Primary or secondary ecological succession?

a)
b)
42.
What is the order of succession shown in this figure?
a)
A, B, C, D
b)
B, A, D, C
c)
C, D, A, B
d)
D, A, B, C
43.

Cattle egrets forage (feed) in fields among cattle. The egret gets easy access to flying insects stirred up by the cattle, and the cattle don't care if they are there or not.

a)

mutualism

b)

commensalism

c)

competition

d)

predation

44.
What type of symbiosis?  Hummingbirds feed on nectar from flowers.  The flowers are pollinated by hummingbirds as they move from flower to flower.
a)
commensalism
b)
mutualism
c)
parasitism
d)
predation
45.
What type of symbiosis?  Skunks often live in burrows that have been dug and abandoned by woodchucks.  
a)
commensalism
b)
mutualism
c)
parasitism
d)
predation
46.

Red-billed oxpeckers are birds that often feed on parasites that infest impala. This is an example of _______.

a)

commensalism

b)

mutualism

c)

parasitism

d)

predation

47.
What type of symbiosis is this?
*Hermit crabs find shells left by snails that have died and move in.
*  Snails die and leave behind their shells.
a)
commensalism
b)
mutualism
c)
parasitism
d)
predation
48.

A tick and a dog have this type of relationship.

a)

mutualism

b)

commensalism

c)

predation

d)

parasitism

49.

The number of females and males of each age contained in a population...

a)

limiting factor

b)

demography

c)

age structure

d)

logistic growth

50.

When a population's growth slows then stops, following a period of exponential growth...

a)

immigration

b)

logistic growth

c)

emigration

d)

population density

51.

The larger a population gets, the faster it grows...

a)

immigration

b)

exponential growth

c)

logistic growth

d)

demography

52.

Movement into a range from elsewhere...

a)

immigration

b)

emigration

c)

demographic transition

d)

density-independent limiting factor

53.

A factor that controls the growth of a population...

a)

limiting factor

b)

exponential growth

c)

density-dependent limiting factor

d)

demographic transition

54.

The study of human populations...

a)

emigration

b)

age structure

c)

demography

d)

immigration

55.

Regardless of population size or density, these factors affect all populations similarly...

a)

density-dependent limiting factors

b)

density-independent limiting factors

c)

carrying capacity

d)

exponential growth

56.

Which statement is true?

a)

There are more men in this country

b)

There are fewer women in this country

c)

There are more 30-34 year olds than 25-29 year olds

d)

There are more people age 25-29 than 30-34

57.

How would you describe the population of this country?

a)

They are experiencing stable population growth

b)

They are experiencing negative population growth

c)

They are experiencing rapid population growth

58.

How would you describe the population of this country?

a)

They are experiencing stable population growth

b)

They are experiencing rapid population growth

c)

They are experiencing negative population growth

59.

How would you describe the population of this country?

a)

They are experiencing rapid population growth

b)

They are experiencing stable population growth

c)

They are experiencing negative population growth

60.

Two factors which increase population size

a)

Birth Rate, Immigration

b)

Death Rate, Immigration

c)

Birth Rate, Emigration

d)

Death Rate, Emigration

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