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Ecological Relationships

Total questions: 25

Worksheet time: 20mins

Name
Class
Date
1.

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. Symbiotic relationship =

a)

mutualism

b)

commensalism

c)

competition

d)

parasitism

2.
A relationship between two organisms in which one organism benefits and the other is unharmed...
a)
Mutualism 
b)
Competition
c)
Parasitsm 
d)
Commensalism 
3.
A tapeworm and a cat have this type of relationship.
a)
mutualism
b)
parasitism
c)
commensalism
d)
competition
4.
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
5.
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
6.
Which symbols best describe parasitism?
a)
+,+
b)
+,-
c)
+,0
d)
-,0
7.
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
8.
A relationship between two organisms in which both organisms benefit. 
a)
Mutualism 
b)
Competition
c)
Parasitsm 
d)
Commensalism 
9.
When a mosquito bites you, you are the __________ and the mosquito is the  ____________.
a)
host, hostess
b)
parasite, host
c)
host, parasite
d)
prey, predator
10.

Aphids are tiny insects that live on and eat the leaves of plants, removing vital nutrients from the plants. What type of symbiosis is this?

a)

Predation

b)

Parasitism

c)

Commensalism

d)

Mutualism

11.

A relationship in which two species live closely together.

a)

resource

b)

mutualism

c)

succession

d)

symbiosis

12.
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
13.
Barnacles create home sites by attaching themselves to whales. This relationship neither harms nor benefits the whales. 
a)
parasitism
b)
commensalism
c)
mutualism
14.
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)
parasitism
b)
commensalism
c)
mutualism
15.
Mistletoe extracts water and nutrients from a spruce tree. The spruce tree is harmed. 
a)
parasitism
b)
commensalism
c)
mutualism
16.

Cows and pronghorn both eat the same types of food in areas of Utah. What is the ecological relationship?

a)

Predation

b)

Symbiosis

c)

Competition

17.

Native sponges and introduced muscles are both filter feeders in many of the Great Lakes. What is the ecological relationship?

a)

Predation

b)

Symbiosis

c)

Competition

18.
The organism that is hunted and eaten in a particular feeding relationship is known as:
a)
Predator
b)
Decomposer
c)
Prey
d)
Autotroph
19.
A feeding relationship where one organism hunts and one is hunted.
a)
Commensalism
b)
Decomposistion
c)
Mutualism
d)
Predator-Prey
20.
An animal that hunts and consumes other organisms is known as a:
a)
Prey
b)
Decomposer
c)
Predator
d)
Commensalist
21.
A relationship between two organisms where one benefits while the other is harmed is known as what?
a)
Decomposition
b)
Consummerism
c)
Mutualism
d)
Parasitism
22.

A tapeworm lives in a human’s skin, taking nutrients from the human. What is the role of the tapeworm in the relationship?

a)

Parasite

b)

Prey

c)

Host

23.
A frog eats a fly. The frog and fly are demonstrating ________.
a)
mutualism
b)
competition
c)
predator/prey
d)
parasitism
24.

A bird builds a nest in a tree and the tree is neither helped nor harmed. What is this type of relationship?

a)

commensalism

b)

predation

c)

mutualism

d)

parasitism

25.
When predator numbers decrease, prey numbers ____________ because fewer of them are being consumed.
a)
decrease
b)
increase
c)
stay the same
d)
divide in half

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