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Relationships in Ecosystems

Total questions: 20

Worksheet time: 55mins

Name
Class
Date
1.
What is mutualism?
a)
One organism benefits greatly and the other is not harmed
b)
One organism benefits while the other is harmed
c)
Close relationship where both organisms benefit
2.
A limited supply of food and shelter in the same habitat will lead to -
a)
mutualism
b)
parasitism
c)
competition
d)
environmental changes
3.
What is the type of symbiotic relationship that helps one organism, but does not harm or help the other?
a)
parasitism
b)
mutualism
c)
commensalism
d)
symbiosis
4.
What is a predator?
a)
Neither
b)
An organism that is consumed
c)
An organism that does the consuming
5.
What is prey?
a)
An organism that is consumed
b)
An organism that consumes
c)
neither
6.
Plants need light, water, and carbon dioxide for photosynthesis.  This is an example of an organism interacting with -
a)
biotic factors
b)
food webs
c)
abiotic factors
d)
dominant factors
7.
Which of these populations is most likely to decrease if the number of grasshoppers decreases?
a)
plants
b)
frog
c)
praying mantis
d)
owl
8.

True or False: The population size of predators are equal to the population size of prey.

a)

True

b)

False

9.

Any relationship in which two different species use each other to live is called _________________.

a)

Predation

b)

Symbiosis

c)

Competition

d)

Harmony

10.

______________ occurs when one organism captures and feeds on another organism.

a)

Predation

b)

Symbiosis

c)

Competition

d)

Dependent

11.

When two or more individuals or populations attempt to obtain a single resource.

a)

Competitive interaction

b)

Mutually beneficial interaction

c)

Dependent interaction

d)

Predatory interaction

12.

In this food web, which animals are in competition?

a)

Hawks and coyotes

b)

Squirrels and hawks

c)

Antelopes and squirrels

d)

Hawks and mountain lions

13.

An organism that makes their own food using sunlight.

a)

Producers

b)

Consumers

c)

Decomposers

d)

Nutrients

14.

What does this image show?

a)

Food web

b)

Food chain

c)

Food pyramid

15.

Who is the top, apex, tertiary consumer in this food web?

a)

Raccoon

b)

Eagle

c)

Grass

d)

Snake

16.

An organism that only eats producers are called _________________.

a)

Primary Consumers

b)

Secondary Consumers

c)

Tertiary Consumers

17.
I show the flow of energy through an ecosystem.
a)
producer
b)
consumer
c)
food chain
d)
competition
18.
I am formed when food chains are linked together.
a)
food web
b)
producer
c)
consumer
d)
enrgy pyramid
19.
I show the order, or sequence, in which organisms in an ecosystem consume one another.
a)
energy pyramid
b)
food web
c)
producer
d)
decomposer
20.

Barnacles and whales: Barnacles attach themselves to whales but don't hurt the whales.

a)

Mutually beneficial

b)

One benefits

c)

Parasite - Host

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