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Unit 1.4 Review

Total questions: 50

Worksheet time: 50mins

Name
Class
Date
1.

A remora fish attaches itself to sharks. As the shark eats, the remora feeds on the scraps.

The shark doesn't harm the remora fish, but does not benefit by its presence either.

This relationship is an example of:

a)

Mutualism

b)

Commensalism

c)

Parasitism

d)

Competition

e)

Predation

2.

Tapeworms are flatworms that attach themselves to the insides of the intestines of

animals such as cows, pigs, and humans. They get food by eating the host's partly

digested food, depriving the host of nutrients. This relationship is an example of:

a)

Mutualism

b)

Commensalism

c)

Parasitism

d)

Competition

e)

Predation

3.

When it's mouth is open, the Nile crocodile permits the Egyptian plover bird

to feed on any leeches attached to its gum. The crocodile gets its teeth cleaned

and the plover gets to eat. This relationship is an example of:

a)

Mutualism

b)

Commensalism

c)

Parasitism

d)

Competition

e)

Predation

4.

Ten tomato plants are grown in one small pot with limited amounts of soil (space and nutrients).

This is an example of:

a)

Mutualism

b)

Commensalism

c)

Parasitism

d)

Competition

e)

Predation

5.

A fly trapped in a spider's web is eaten by the spider. This is an example of:

a)

Mutualism

b)

Commensalism

c)

Parasitism

d)

Competition

e)

Predation

6.

Which of the following best describes a predatory interaction in an ecosystem?

a)

Cooperation between two species

b)

Competition for resources among species

c)

One organism hunting and consuming another organism

d)

Mutual exchange of benefits between organisms

7.

Which organism do the owl and the weasel

compete for in the food web?

(Click on the image to view it larger.)

a)
Hawk
b)
Spider
c)
Grasshopper
d)
Shrew
8.

Based on the information in the food web, which organism would

be least affected by overfishing for cod in the Arctic waters?

(Click on the image to view it larger.)

a)

Baleen Whales

b)

Toothed Whales

c)

Shrimp

d)

Seals

9.

The variety and variability of life in an ecosystem is called:

a)

biodiversity

b)

nature-culture relationship

c)

carrying capacity

d)

poaching

10.

Fungus and lichens live together. The fungus gets food from the algae while the algae. gets a place to live.

a)

Mutualism

b)

Commensalism

c)

Parasitism

d)

Competition

e)

Predation

11.

The parasitic roundworm anchors itself to the wall of the intestine adn causes diseases to the organisms.

a)

Mutualism

b)

Commensalism

c)

Parasitism

d)

Competition

e)

Predation

12.

Spiders create their webs on stems and trunks of plants

a)

Mutualism

b)

Commensalism

c)

Parasitism

d)

Competition

e)

Predation

13.

A mouse is captured and eaten by an owl

a)

Mutualism

b)

Commensalism

c)

Parasitism

d)

Competition

e)

Predation

14.

Chimpanzees fight to achieve supremacy in the tribe

a)

Mutualism

b)

Commensalism

c)

Parasitism

d)

Competition

e)

Predation

15.

Identify the type of symbiotic relationship where one organism benefits and the other is neither helped nor harmed.

a)

Mutualism

b)

Parasitism

c)

Commensalism

d)

Predation

16.

How does energy transfer from one trophic level to the next in an ecosystem?

a)

Through the consumption of organisms at a lower trophic level

b)

Through the absorption of sunlight

c)

Through the decomposition of dead organisms

d)

Through the release of heat

17.

Explain how a decrease in the prey population can affect the predator population in a predator-prey relationship.

a)

The predator population will increase

b)

The predator population will decrease

c)

The predator population will remain the same

d)

The predator population will become extinct

18.

In an ecosystem, which of the following best describes the flow of energy?

a)

Energy flows from consumers to producers

b)

Energy flows from decomposers to producers

c)

Energy flows from producers to consumers

d)

Energy flows from consumers to decomposers

19.

In an ecosystem, which of the following best describes the flow of energy?

a)

Energy flows from consumers to producers

b)

Energy flows from decomposers to producers

c)

Energy flows from producers to consumers

d)

Energy flows from consumers to decomposers

20.

Models the complex network of feeding relationships

a)

trophic levels

b)

food webs

c)

food chains

21.

Energy pyramids ...

a)

help PG&E

b)

models the transfer of energy between levels.

c)

models energy in people

22.

Plants are...

a)

producers

b)

herbivores

c)

omnivores

23.

Primary consumers are ..

a)

omnivores

b)

herbivores

c)

carnivores

24.

Calories, kilocalories, and joules are a measure of

a)

species

b)

energy

c)

plants

25.

What happens when the niches of 2 organisms overlap?

a)

They begin to share resources and form a mutualistic relationship

b)

The species compete with each other

c)

Once organism dies while the other survives

d)

The organisms form a social group and live together

26.

How do species avoid niche overlap?

a)

They try to avoid all other organisms at all costs

b)

They may go after different resources to avoid competition

c)

They actively try to steal resources from other individuals

d)

They isolate themselves and avoid species interactions

27.

Remora fish have a disk on their heads that makes them able to attach to larger animals, such as sharks, mantas, and whales. When the larger animal feeds, the remora detaches itself to eat the extra food. The sharks, etc. dont get anything from the relationship. This is an example of...

a)

mutualism

b)

commensalism

c)

parasitism

d)

competition

28.

Which of the following is a mathematical representation used to describe the flow of energy in an ecosystem?

a)

Food web

b)

Energy pyramid

c)

Carbon cycle

d)

Water cycle

29.
What is this called?
a)
Food Web
b)
Food Chain
c)
Abiotic Factors
d)
Food pyramid
30.
What is this called?
a)
Food Web
b)
Food Chain
c)
Abiotic Factors
d)
Food pyramid
31.
What does a Primary (1st-order) Consumer eat?
a)
Tertiary Consumers
b)
Secondary Consumers
c)
Producers
d)
Nothing
32.
An organism that lives by breaking apart dead plants and animals and returning nutrients to the soil is a..
a)
scavenger
b)
consumer
c)
decomposer
d)
carnivore
33.
An animal that eats other animals is a/an....
a)
carnivore
b)
omnivore
c)
herbivore
d)
decomposer
34.
If the grasshopper were to be removed completely from the food web, what organism would be most effected?
a)
The squirrel
b)
The shrew
c)
The deer
d)
The rabbit
35.
The rabbit in this food web would be considered a:
a)
Decomposer
b)
Producer
c)
Secondary (2nd order) Consumer
d)
Primary (1st order) Consumer
36.
Why might an organism have more than one arrow coming from them in a food web?
a)
More than one organism may eat them. 
b)
They may eat more than one other organism. 
c)
This organism gets its energy from multiple sources. 
d)
They have no resources available to them.
37.

What does a food web show?

a)

the flow of food between animals

b)

the flow of energy through an ecosystem

c)

the flow of water through an ecosystem

d)

the flow of food between decomposers

38.

Which group of living things makes up the bottom level of an energy pyramid?

a)

consumers

b)

herbivores

c)

carnivores

d)

producers

39.

Which best describes algae?

a)

producers in a pond ecosystem

b)

consumers in an ocean ecosystem

c)

prey in a forest ecosystem

d)

predators in a salt marsh ecosystem

40.
What do you always find at the start of a food chain or web?
a)
An insect 
b)
A green plant 
c)
A bird 
d)
A worm 
41.
Where does the energy start in this food chain?
a)
Plant
b)
Sun
c)
Deer
d)
Wolf
42.
The arrows in a food chain or web represents what?
a)
They point to the organism that is being eaten.
b)
It shows how sunlight flows within an ecosystem.
c)
They show what direction the energy is flowing between organisms. 
d)
They represent how water is transferred within a habitat.
43.
The largest group of organisms found in a food web would be:
a)
Primary Consumers
b)
Producers
c)
Decomposers
d)
Tertiary Consumers
44.

If producers have 1000 KJ of energy, how much energy is available for the secondary consumers?

a)

10 KJ

b)

1 KJ

c)

100 KJ

d)

1000 KJ

45.
The amount of energy that usually transfers from one trophic level to the next...
a)
10%
b)
20%
c)
80%
d)
50%
46.
If there is 1000 Kcal available in the producers in trophic level 1, how much energy is available in the herbivores in trophic level 2?
a)
10 Kcal
b)
1 Kcal
c)
100 Kcal
d)
1000 Kcal
47.

Look carefully at the image. If energy is lost as it moves up the food chain, what trophic level has the most amount of energy?

a)

1st level - producers

b)

2nd level - primary consumers

c)

3rd level - secondary consumers

d)

4th level - tertiary consumers

48.

How many calories will be passed on from 250 to the next trophic level?

a)

2,500

b)

25

c)

2.5

d)

10%

49.

This question is confusing! Look CAREFULLY at the image. What trophic level is the PRIMARY consumer?

a)

1st

b)

2nd

c)

3rd

d)

4th

50.
In the energy pyramid here, how much of the energy in each level gets lost as heat or used by the organism for survival?
a)
80%
b)
90%
c)
10%
d)
20%

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