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Free Practice Quiz Question List

3 Ecological Interactions Online Quiz Questions

Use this free practice quiz with 20 questions to review 3 Ecological Interactions, test your knowledge, and prepare for your next test or exam.

20 questions
01
Choose one
1 point

In one forest, two bird species eat insects but feed in different parts of the canopy. Which process can help them coexist by reducing direct competition?

  1. A

    Predation

  2. B

    Resource partitioning

  3. C

    Mutualism

  4. D

    Commensalism

02
True or false
1 point

The effects assigned to ecological interaction categories are typical patterns, not unchanging rules.

  1. A

    True

  2. B

    False

03
Written response
1 point

What is the ecological term for competition among members of the same species?

04
Choose one
1 point

A bird gains shelter by nesting in a tree, while the tree is not noticeably helped or harmed. Which interaction best describes this relationship?

  1. A

    Mutualism

  2. B

    Parasitism

  3. C

    Commensalism

  4. D

    Competition

05
Fill in the blank
1 point

If prey become abundant, predators may have more and increase in number. Increased predation can then reduce .

06
Choose one
1 point

An animal eats leaves from a plant but does not usually kill the plant. Which interaction is this?

  1. A

    Predation

  2. B

    Herbivory

  3. C

    Competition

  4. D

    Parasitism

07
Choose all
1 point

Which examples typically benefit one species and harm the other? Select all that apply.

  1. A

    A hawk captures and eats a mouse.

  2. B

    A caterpillar eats leaves.

  3. C

    A tapeworm obtains nutrients from its host.

  4. D

    Two plant species compete for light.

  5. E

    A pollinator obtains nectar while pollinating a flower.

08
True or false
1 point

A parasite usually kills its host immediately after obtaining resources from it.

  1. A

    True

  2. B

    False

09
Written response
1 point

A pollinator obtains food from a flower while transferring pollen that can help the plant reproduce. What is the term for this kind of interaction?

10
Fill in the blank
1 point

Plants may reduce damage from herbivores with or .

11
Choose all
1 point

An increase in grazing changes the amount of vegetation in an area. Which outcomes are possible? Select all that apply.

  1. A

    Plant growth, survival, or reproduction may change.

  2. B

    Resources or habitat available to other species may change.

  3. C

    The herbivore necessarily kills the entire plant.

  4. D

    Other species cannot be affected by changes in vegetation.

12
Open ended
1 point

Ticks feed on mammals and can harm their hosts. Explain how this parasitic interaction could indirectly affect other members of the community.

13
True or false
1 point

A symbiotic relationship is not necessarily beneficial to both species.

  1. A

    True

  2. B

    False

14
Choose one
1 point

A pollinator obtains nectar from a flower and transfers pollen that can help the plant reproduce. Which interaction best describes this relationship?

  1. A

    Mutualism

  2. B

    Commensalism

  3. C

    Competition

  4. D

    Parasitism

15
Choose one
1 point

Several animals need the same limited number of nesting sites. Which conclusion about these animals is supported, regardless of whether they belong to the same species?

  1. A

    They use different resources, so competition cannot occur.

  2. B

    They may compete if the nesting sites are limited.

  3. C

    They must be members of different species to compete.

  4. D

    They benefit one another because they need the same resource.

16
Written response
1 point

Two individuals of the same species compete for limited nesting sites. What is this form of competition called?

17
Choose one
1 point

A bird gains shelter by nesting in a tree, while the tree is not noticeably helped or harmed. Which interaction best fits this example?

  1. A

    Mutualism

  2. B

    Parasitism

  3. C

    Commensalism

  4. D

    Competition

18
Choose one
1 point

A prey population becomes abundant and provides more food for its predators. Which outcome is consistent with the resulting predator–prey relationship?

  1. A

    The predators must decline because their prey are more numerous.

  2. B

    Predators may increase, and increased predation may later reduce prey numbers.

  3. C

    The prey will remain unaffected because predators gain food.

  4. D

    The predators and prey will both necessarily increase indefinitely.

19
Written response
1 point

What is the ecological term for an interaction in which one species benefits while the other is not noticeably helped or harmed?

20
Choose one
1 point

Which scenario is most characteristic of herbivory rather than predation?

  1. A

    An animal consumes part of a plant, which may survive but have altered growth or reproduction.

  2. B

    A predator captures and consumes prey, usually killing it.

  3. C

    Two species use the same limited food source.

  4. D

    A parasite obtains resources from a host and usually kills it immediately.