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Ecology Review: Population Dynamics, Food Chains, & Food Webs

Total questions: 45

Worksheet time: 30mins

Name
Class
Date
1.
What are plants called in a food chain?
a)
Producers
b)
Consumers
c)
Decomposers
d)
Scavengers
2.
What are animals called in a food chain?
a)
Producers
b)
Consumers
c)
Decomposers
d)
Plants
3.
What are the organisms that break down dead stuff?
a)
Producers
b)
Consumers
c)
Decomposers
d)
Organisms
4.
All energy on Earth ultimately comes from what source?
a)
Water
b)
Sun
c)
Consumers
d)
Oxygen
5.
The arrows in a food chain or web represents what?
a)
They point to the organism that is being eaten.
b)
It shows how sunlight flows within an ecosystem.
c)
They show what direction the energy is flowing between organisms. 
d)
They represent how water is transferred within a habitat.
6.
What does a food web represent?
a)
All connections of energy flow throughout all organisms in a habitat.
b)
The specific ways that mutualism is carried out.
c)
A single pathway or energy flow between organisms. 
d)
How carnivores get their food. 
7.
What is a trophic level?
a)
Each 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. 
8.
An energy pyramid represents what?
a)
How much sunlight is available for the ecosystem to use. 
b)
How much energy a particular organism needs. 
c)
How much energy is needed to build a pyramid. 
d)
The amount of energy available to the next 'feeder' in a food web.
9.
How much energy is available to be passed on to the next trophic level in an ecosystem?
a)
100%
b)
10%
c)
50%
d)
75%
10.
Why might an organism have more than one arrow coming from them in a food web?
a)
More than one organism may eat them. 
b)
They may eat more than one other organism. 
c)
This organism gets its energy from multiple sources. 
d)
They have no resources available to them.
11.

What group on the ecological pyramid contains the most energy or biomass?

a)

Primary Consumers

b)

Producers

c)

Secondary Consumers

d)

Tertiary Consumers

12.

What would be most likely to happen if the snowshoe hare was removed from the food web pictured?

a)

The insects in the habitat would increase.

b)

The shrew population would decrease due to being only hawk food source.

c)

The willow tree population would decrease.

d)

Foxes would dies due to no food source.

13.
The rabbit in this food web would be considered a:
a)
Decomposer
b)
Producer
c)
Secondary Consumer
d)
Primary Consumer
14.
The fox in this food web would be considered a:
a)
Tertiary Consumer
b)
Producer
c)
Secondary Consumer
d)
Primary Consumer
15.
The mouse in this food web would be considered a:
a)
Primary Consumer
b)
Producer
c)
Tertiary Consumer
d)
Secondary Consumer
16.
The image provided is an example of a(n):
a)
Autotroph
b)
Carnivore
c)
Herbivore
d)
Decomposer
17.

The image provided is an example of a(n):

a)

Carnivore

b)

Herbivore

c)

Producer

d)

Omnivore

18.

The image provided is an example of a(n):

a)

Producer

b)

Carnivore

c)

Omnivore

d)

Herbivore

19.
Which symbols best describe mutualism?
a)
+,+
b)
+,-
c)
+,0
d)
-,0
20.
Which symbols best describe parasitism?
a)
+,+
b)
+,-
c)
+,0
d)
-,0
21.
Which symbols best describe commensalism?
a)
+,+
b)
+,-
c)
+,0
d)
0,0
22.

A tick and a dog have this type of relationship.

a)

mutualism

b)

commensalism

c)

herbivory

d)

parasitism

e)

predation

23.

Barnacles create home sites by attaching themselves to whales. This neither harms nor benefits the whales.

a)

Mutualsim

b)

Parasitism

c)

Commensalism

d)

Predation

e)

Herbivory

24.

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

d)

Competition

e)

Predation

25.

The lion and the hyenas fight over the same zebra carcass.

a)

Mutualism

b)

Parasitism

c)

Commensalism

d)

Competition

e)

Predation

26.

The population size decreases when ____________.

Select two options.

a)

there are more deaths than births.

b)

there are more births than deaths.

c)

there is more emigration than immigration.

d)

there is more immigration than emigration

27.

A population is __________________.

a)

a group of organisms of the same species, in the same place, at the same time.

b)

a group of organisms of the different species, in the same place, at the same time.

c)

an individual organism of the one species, in the same place, at the same time.

d)

a group of organisms of the same species, in the different place, at the same time.

28.
What is the carrying capacity of the graph?
a)
around 500
b)
more than 500
c)
less than 500
d)
around 600
29.

When we did our lab, "Oh Deer," caused the population of deer to decrease? Select all that apply.

a)

Not enough resources were available

b)

Too many resources were available

c)

Predation

d)

Mutualism

30.

What kind of growth is shown in the graph above?

a)

logistical growth

b)

exponential growth

c)

parallel growth

d)

statistical growth

31.

What kind of growth is shown in the graph above?

a)

logistical growth

b)

exponential growth

c)

parallel growth

d)

statistical growth

32.

Select all examples of density dependent factors.

a)

hurricanes

b)

disease

c)

tornadoes

d)

competition

e)

stress from over-crowding

33.

Select all examples of density independent factors.

a)

hurricanes

b)

disease

c)

tornadoes

d)

competition

e)

stress from over-crowding

34.

All of the living and non-living things in an area is called a...

a)

population

b)

community

c)

ecosystem

d)

species

35.
What are the four most important materials needed by living organisms?
a)
water, carbon, oxygen, nitrogen
b)
water, food, oxygen, carbon
c)
water, carbon, nitrogen, phosphorous
d)
water, carbon, food, phosphorous
36.
An underground layer of rocks or sand that can hold groundwater.
a)
watershed
b)
levee
c)
aquifer
d)
erosion
37.
This is essential to living organisms, it is found in nucleic acid and amino acids.
a)
Nitrogen
b)
Carbon
c)
Water
d)
Phosphorous
38.
The conversion of ammonium to nitrate is called what?
a)
nitrification
b)
renitrification
c)
denitrification
d)
unnitrification
39.
What is it called when water vapor cools and changes into a liquid?
a)
condensation
b)
respiration
c)
precipitation
d)
evaporation
40.
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
41.
The three steps of the water cycle include:
a)
condensation, precipitation, filtration
b)
filtration, irrigation, evaporation
c)
precipitation, condensation, evaporation
d)
precipitation, filtration, evaporation
42.
Which of the following is NOT part of the carbon cycle?
a)
condensation
b)
photosynthesis
c)
combustion
d)
respiration
43.
Which of these is the greatest cause of harmful levels of carbon in the atmosphere?
a)
respiration
b)
combustion
c)
photosynthesis
d)
decomposition
44.
Which of these steps is part of the nitrogen cycle AND the phosphorous cycle?
a)
it starts off inside underwater rocks and dirt
b)
bacteria convert it into organic compounds
c)
animals leaving waste and death and decay release it back into the soil
d)
rain water and ocean waves break off pieces, putting it back into the ecosystem
45.
Which of these is a step in the carbon cycle, the nitrogen cycle, and the phosphorous cycle?
a)
condensation
b)
decomposition
c)
respiration
d)
photosynthesis

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