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Ecosystems Test

Total questions: 31

Worksheet time: 1hrs 20mins

Name
Class
Date
1.
A food pyramid represent the relative amount of energy in trophic levels. Which of the following correctly shows a food pyramid?
a)
A
b)
B
c)
C
d)
D
2.
What does the graph represent?
a)
Emigration
b)
Exponential growth
c)
Immigration
d)
Logistic Growth
3.
What do you call the population size represented by the dashed-Line
a)
Carrying Capacity
b)
Limiting Factor
c)
Ecosystem
d)
Death Rate
4.

What type of growth does this graph represent? Select all that apply.

a)

carrying capacity

b)

exponential growth

c)

linear growth

d)

logistic growth

5.

What effect will a decrease in the frog population most likely have on the other trophic levels?

a)

The slug population will decrease, and the heron population will increase.

b)

The slug population will increase, and the heron population will decrease.

c)

The slug and heron populations will increase, and the plant population will decrease.

d)

The slug and heron populations will decrease, and the plant population will increase.

6.
Sharks consume smaller fish they catch in the ocean. This is an example of what type of relationship?
a)
predator/prey
b)

parasite/host

7.
In the tropical regions of Africa, the crocodile lies with its mouth open. The plover flies into its mouth and feeds on bits of decaying meat stuck in the crocodile’s teeth. The crocodile does not eat the plover. Instead, he appreciates the dental work. The plover eats a meal and the crocodile gets his teeth cleaned. This is an example of 
a)
mutualism
b)
commensalism
c)

parasitism

8.
The deer tick attaches to a warm blooded animal and feeds on its blood. Ticks need blood at every stage of their life cycle. They also carry Lyme disease, an illness that can cause joint damage, heart complications, and kidney problems. The tick benefits from eating the animal's blood. Unfortunately, the animal suffers from the loss of blood and nutrients and may get sick.This is an example of 
a)
mutualism
b)
commensalism
c)

parasitism

9.
Remora fish are very bony and have a dorsal fin (the fin on the back of fish) that acts like a suction cup. Remora fish use this fin to attach themselves to whales, sharks, or rays and eat the scraps their hosts leave behind. The remora fish gets a meal, while its host gets nothing. Selfish, sure, but neither gets hurt. This is an example of 
a)
mutualism
b)
commensalism
c)

parasitism

10.
The diagram represents a pyramid of energy in an ecosystem.  Which level would most likely contain organisms that do photosynthesis?
a)
A
b)
B
c)
C
d)
D
11.
What percentage of energy is passed on to each trophic level?
a)
10%
b)
50%
c)
90%
d)
100%
12.
The arrows in a food chain or web represent ...
a)
They point to the organism that is being eaten.
b)
It shows how sunlight flows within an ecosystem.
c)
They show the direction the energy is flowing between organisms. 
d)
They represent how water is transferred within a habitat.
13.

Which organism do the owl and the weasel compete for in the food web?

a)

Hawk

b)

Spider

c)

Grasshopper

d)

Shrew

14.

If the producers produce 1000 J of energy, how much energy does the secondary consumer level receive?

a)

1000 J

b)

10 J

c)

100 J

d)

1 J

15.

How did the increased population of wolves in year 5 affect the deer population in year 6?

a)

The increase in wolves led to a decrease in deer.

b)

There was no effect because the data showed that the population stayed the same.

c)

The increase in wolves led to an increase in deer.

16.

What causes competition to occur in an environment?

a)

Good conditions make resources plentiful.

b)

Organisms struggle for a limited resource.

c)

Members of a population have different roles.

d)

A population falls below the environment’s carrying capacity.

17.

in 2021, which group had the highest population?

a)

bears

b)

dolphins

c)

whales

18.

Grouse, hares, and voles feed on vegetation. Where on the graph would you expect vegetation to be in short supply?

a)

I

b)

II

c)

III

19.

What happened to the Hare population after the decrease in Lynx population in 1860?

a)

The decrease of lynx led to an increase in the amount of hares.

b)

The decrease of lynx led to a decrease in the hare population.

c)

The hare population stayed the same.

20.

Which scenarios best applies to the above graph? Select all that apply.

a)

The fox population is increasing because they have not reached their carrying capacity.

b)

The rabbit population stayed the same because they were not being hunted.

c)

The fox population increase because there are plenty of rabbits to eat.

d)

The fox population decreased, while the rabbit population increased.

21.

To assess a population's growth rate, what things would a scientist need to know? Select all that apply.

a)

how many individuals are born

b)

how many individuals die

c)

how many individuals move into and out of an area

d)

the ages of the individuals in the population

22.

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. This type of relationship is:

a)
mutualism
b)
commensalism
c)
competition
d)
parasitism
23.

Hummingbirds feed on nectar from flowers.  The flowers are pollinated by hummingbirds as they move from flower to flower. What type of relationship does this show?

a)
commensalism
b)
mutualism
c)
parasitism
d)
predation
24.
Red-billed oxpeckers are birds that often feed on parasites that infest impala.  This is an example of _______.
a)
commensalism
b)
mutualism
c)
neutralism
d)
competition
25.
Which organisms in the food web shown to the right are predators that compete for the same prey in this environment?
a)
Coyotes and rabbits
b)
White-tailed deer and rabbits
c)
Leafy weeds and cotton rats
d)
Bobcats and coyotes
26.

Which kind of organism is an autotroph?

a)

consumer

b)

producer

c)

decomposer

d)

herbivore

27.

Which organisms are heterotrophs?

a)

photosynthesizers

b)

producers

c)

consumers

d)

plants

28.

Which organism is an example of a producer?

a)

moth

b)

mushroom

c)

rose bush

d)

cheetah

29.

Maggots feed on dead and decaying organisms for energy. What are maggots?

a)

autotrophs

b)

producers

c)

decomposers

d)

heterotrophs

30.

Click on ALL abiotic factors in the picture. (Click on more than one.)

a)

fish

b)

pond

c)

dragonfly

d)

frog

e)

sun

31.

Click on ALL biotic factors in the picture. (Click on more than one.)

a)

fish

b)

pond

c)

dragonfly

d)

frog

e)

sun

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