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Symbiotic Relationships

Total questions: 37

Worksheet time: 1hrs 1mins

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.
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.
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
4.
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
5.
Which symbols best describe parasitism?
a)
+,+
b)
+,-
c)
+,0
d)
-,0
6.
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
7.
A relationship between two organisms in which both organisms benefit. 
a)
Mutualism 
b)
Competition
c)
Parasitsm 
d)
Commensalism 
8.
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
9.

Aphids are tiny insects that live on and eat the leaves of plants, removing vital nutrients from the plants.

a)

Predation

b)

Parasitism

c)

Commensalism

d)

Mutualism

10.
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
11.
Which symbols best describe mutualism?
a)
+,+
b)
+,-
c)
+,0
d)
-,0
12.
Silverfish live and hunt with army ants. They share the prey.  They neither help nor harm the ants. 
a)
Mutualism 
b)
Parasitism 
c)
Commensalism 
13.
A tick and a dog have this type of relationship.
a)
mutualism
b)
commensalism
c)
neutralism
d)
parasitism
14.
Barnacles create home sites by attaching themselves to whales. This relationship neither harms nor benefits the whales. 
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.
Ostriches and gazelles feed next to each other. They both watch for predators and alert each other to danger. Because their visual abilities are different, they can identify threats that the other animal would not see as readily. 
a)
parasitism
b)
commensalism
c)
mutualism
17.
Honey guide birds alert and direct badgers to bee hives. The badgers then expose the hives and feed on the honey first. Next the honey guide birds eat. Both species benefit. 
a)
parasitism
b)
commensalism
c)
mutualism
18.
A cuckoo may lay its eggs in a warbler’s nest. The cuckoo’s young will knock the warbler’s eggs out of a nest and the warbler will raise the cuckoo’s young.
a)
parasitism
b)
commensalism
c)
mutualism
19.
Oxpeckers feed on the ticks found on a rhinoceros. The oxpeckers get a meal and the rhinoceros is helped by the removal of the ticks.
a)
parasitism
b)
commensalism
c)
mutualism
20.
As bison walk through grass, insects become active and are seen and eaten by cowbirds. The relationship neither harms nor benefits the bison.
a)
parasitism
b)
commensalism
c)
mutualism
21.

A relationship between two organisms in which one organism benefits and the other is unharmed...

a)

Mutualism

b)

Commensalism

c)

Parasitism

22.

A relationship between two organisms in which both organisms benefit.

a)

Mutualism

b)

Commensalism

c)

Parasitism

23.

A relationship between two organisms in which one is benefited and the other is harmed.

a)

Mutualism

b)

Commensalism

c)

Parasitism

24.

Ostriches and gazelles eat together. They both watch for predators and danger. Since they see things differently, they each can identify threats the other animal may not see. Both species are benefited.

a)

mutualism

b)

commensalism

c)

parasitism

25.

Yucca flowers are pollinated by yucca moths. The moths lay their eggs in the flowers and the eggs hatch. The larvae eat some of the seeds, and spread them around. Both species are benefited.

a)

mutualism

b)

commensalism

c)

parasitism

26.

A bison walks through the grass, insects fly up and are seen and eaten by egrets. This neither harms nor helps the bison, but it is easier for the egrets to get food.

a)

mutualism

b)

parasitism

c)

commensalism

27.

A flea feeds on a mouse’s blood. This is good for the flea but bad for the mouse.

a)

mutualism

b)

commensalism

c)

parasitism

28.

Hermit crabs live in shells that snails don't use anymore. The hermit crab gets a nice free home. This neither harms nor helps the snails.

a)

mutualism

b)

commensalism

c)

parasitism

29.

Birds build nests out of dead twigs and leaves. They build their nests in living trees. This doesn't hurt the tree.

a)

mutualism

b)

commensalism

c)

parasitism

30.
A coyote captures, kills, and eats a rabbit. What type of symbiotic relationship is this?
a)
mutualism
b)
commensalism
c)
parasitism
d)
predation
31.
A tapeworm lives in the intestines of a dog. It absorbs food the dog has eaten and grows larger in the process. The dog becomes weaker from malnutrition. What type of symbiotic relationship is this?
a)
mutualism
b)
commensalism
c)
parasitism
d)
predation
32.
Remoras are small fish that swim close to or attach themselves to sharks.  Remoras eat small scraps left as the sharks feed and the sharks are unaffected. 
a)
Competition
b)
Predation
c)
Mutualism
d)
Commensalism
33.
Which symbols best describe commensalism?
a)
+,+
b)
+,-
c)
+,0
d)
0,0
34.

Mosquitoes are parasitic with humans because: (choose 2)

a)

They feed off human blood

b)

The human host is harmed

c)

They are annoying

d)

they spread disease

35.

Bromeliads and trees are in a commensal relationship because: (choose 2)

a)

the tree provides shelter and an environment for the bromeliad

b)

the tree is harmed from the bromeliad taking food from it

c)

the tree is not harmed or helped by the bromeliad

d)

the tree takes nutrients from the bromeliad

36.

Predation is similar to _______________ in that both types of relationship benefit one of the interacting species while the other is harmed.

a)

Parasitism

b)

Commensalism

c)

Mutualism

37.

Which of the following best describes a difference between a mutualistic relationship and a parasitic

relationship?

a)

Parasitism harms both organisms, while mutualism harms only one organism.

b)

Parasitism benefits only one organism, while mutualism benefits both organisms.

c)

Parasitism involves only two organisms, while mutualism involves many organisms.

d)

Parasitism continues for many generations, while mutualism is limited to one generation.

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