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Unit 2: Ecological Interactions Review

Total questions: 26

Worksheet time: 23mins

Name
Class
Date
1.
 Hermit crabs live in shells made and then abandoned by snails. This relationship neither helps nor harms the snails.
a)
parasitism
b)
commensalism
c)
mutualism
2.
A cuckoo may lay its eggs in a warbler's nest.  The cuckoo's young will displace (or move) the warbler's young and will be raised by the warbler.  
a)
Parasitism
b)
Commensalism
c)
Predation
d)
Competition
3.

Another word for a plant that makes its own food using energy from sunlight…

a)

photosynthesis

b)

producer

c)

heterotroph

d)

carnivore

e)

herbivore

4.
An organism that needs to eat other organisms to obtain energy is known as a:
a)
Autotroph
b)
Producer
c)
Consumer
d)
Mutualist
5.

What is the definition of - Herbivore

a)

An organism that obtains energy by eating both plants and animals

b)

The rate at which organic matter is created by producers in an ecosystem

c)

An organism that obtains energy by eating only plants

d)

An organism that obtains energy by eating only animals

6.

What is the definition of - Carnivore

a)

An organism that obtains energy by eating both plants and animals

b)

An organism that feeds on plant and animal remains and other dead matter

c)

An organism that obtains energy by eating only plants

d)

An organism that obtains energy by eating only animals

7.

What is the definition of - Omnivore

a)

An organism that obtains energy by eating both plants and animals

b)

An organism that feeds on plant and animal remains and other dead matter

c)

An organism that obtains energy by eating only plants

d)

Series of steps in an ecosystem in which organisms transfer energy by eating and being eaten.

8.
Is the SUN  biotic or abiotic 
a)
Abiotic 
b)
Biotic 
9.
This is known as a relationship in which both organisms involved benefit. 
a)
Predator-Prey
b)
Commensalism
c)
Mutualism
d)
Decomposition
10.

An organism that needs to use sunlight to make its own food is known as a(n):

a)

Heterotroph

b)

Autotroph

c)

Decomposer

d)

Consumer

11.
This term describes a living part of an environment.
a)
Biotic factor
b)
Sunlight
c)
Abiotic Factor
d)
Niche
12.
The direction of the flow of energy in a food web is represented by ___.
a)
Light bulbs
b)
Dotted Lines
c)
Arrows
d)
Bubbles
13.
Energy increases as you move up the food pyramid (from bottom to top).
a)
True 
b)
False
14.
A connection of food chains with many food energy paths in an ecosystem is a ____________
a)
ecosystem
b)
food web
c)
environment
15.
What percentage of energy is passed on to each tropic level?
a)
10%
b)
50%
c)
90%
d)
100%
16.
All food chains begin with a ____________.
a)
primary consumer
b)
secondary consumer
c)
producers
d)
scavengers
17.
In this energy pyramid, which organisms have the most energy available?
a)
Producers
b)
Carnivores
c)
Herbivores
d)
Top Predator
18.

Which organism do the owl and the weasel compete for in the food web?

a)

Hawk

b)

Spider

c)

Grasshopper

d)

Shrew

19.
An organism that eats the secondary consumer.
a)
Primary Consumer
b)
Secondary Consumer
c)
Tertiary Consumer
d)
Consumer
20.
An organism's _________ is defined as the environment in which it lives.
a)
habitat
b)
niche
c)
social structure
d)
ecosystem
21.

The ecological role an organism performs in their specific environment is considered the organism's...

a)

Habitat

b)

Population

c)

Biome

d)

Niche

22.
The ecological niches of three bird species are shown in the diagram. What is the advantage of each bird species having a different niche?
a)
As more birds feed higher in the tree, available energy increases.
b)
More abiotic resources are available for each bird.
c)
Predators are less likely to feed on birds in a variety of locations.
d)
There is less competition for food.
23.
When put together, one organism outcompetes the other for resources.  This is an example of:
a)
competitive exclusion principle
b)
speciation
c)
biological niche
d)
evolution
24.
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.
25.
The owl receives energy from which organisms?
a)
grasshopper and mouse
b)
mouse and rabbit
c)
rabbit and butterfly
d)
butterfly and frog
26.

What would happen to the bird if the green fish died out?

a)

the bird population would grow

b)

the bird population would die out

c)

the smaller fish will die out

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