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Symbiotic Relationships

Total questions: 10

Worksheet time: 6mins

Name
Class
Date
1.

In which type of symbiotic relationship do both species benefit (+,+) ?

a)

Commensalism

b)

Parasitism

c)

Mutualism

d)

Predation

2.

In which type of symbiotic relationship does one species benefit while the other species is not affected (+, 0)?

a)

Commensalism

b)

Parasitism

c)

Mutualism

d)

Predation

3.

In which type of symbiotic relationship does one species benefit while the other species is harmed (+,-)?

a)

Commensalism

b)

Parasitism

c)

Mutualism

d)

Predation

4.

True or False: Symbiosis only works with animals.

a)

True

b)

False

5.
Cattle egrets are birds that forage in fields among cattle. The egrets get easy access to food and the cattle don't care if they are there or not.
a)
mutualism
b)
commensalism
c)
competition
d)
parasitism
6.
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 
7.

Overall, all the interactions between organisms in ecosystems...

a)

Keep ecosystems & populations unstable and random

b)

Keep ecosystems & populations stable and balanced

8.

Which of the following is NOT a symbiotic relationship?

a)

Competition

b)

Commensalism

c)

Mutualism

d)

Parasitism

9.

How does competition between organisms maintain ecosystem stability and biodiversity?

a)

The winners of the competition increase in population size and dominate the ecosystem

b)

Both organism populations become stronger and larger as a result of the competition

c)

The population sizes are kept in check due to limited resources

d)

All of the above are true

10.

Commensalism is a symbiotic relationship in which what occurs between the organisms?

a)

both organisms are harmed

b)

one benefits, the other is unaffected

c)

one benefits, the other is harmed

d)

one benefits by eating the other