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Interdependence in Ecosystems Elementary

Total questions: 24

Worksheet time: 48mins

Name
Class
Date
1.
What is the primary consumer in this food chain?
a)
Grasses
b)
Cricket
c)
Bird
d)
Snake
2.
Which of the following statements is the best explanation of the role of a primary consumer within a food web?
a)
a primary consumer is at the top of the food chain and usually eats only other animals
b)
a primary consumer decomposes the remains of dead organisms
c)
a primary consumer eats plants and producers 
d)
a primary consumer eats decomposers to place nutrients in the soil
3.
A healthy ecosystem must have producers, consumers, and decomposers. Most decomposers are either fungi or bacteria. Why are decomposers an essential part of a healthy ecosystem?
a)
Decomposers are a necessary part of the diet of most consumers
b)
Decomposers extract energy from sunlight through the process of photosynthesis and are eaten by predators
c)
Decomposers sustain ecosystems by filtering water for animals to drink 
d)
Decomposers breaking down the remains of organisms and return the energy to the soil for producers to use.
4.
A food web shows the relationships between the organisms in an ecosystem. If a drought occurs and kills off most of the producers, such as the plants, what is the most likely outcome?
a)
The populations of all levels of consumers would decrease.
b)
The primary consumers would have to adapt to eating each other.
c)
Only the population of the secondary and tertiary consumers would decline
d)
The primary consumers would die and the secondary consumers would eat them
5.
The diagram below shows the feeding relationships among organisms in a certain environment. Which organism would be a tertiary consumer?
a)
Owl
b)
Plant
c)
Snake
d)
Cricket 
6.
In the food web above, which animal would be considered both a predator and a prey? (do not include plant eating animals as predators). 
a)
The grasshopper
b)
The rabbit
c)
The snake
d)
The Plant
7.
Hummingbirds share a mutualistic relationship with the flowers they feed on. Which of these statements about mutualistic relationships is true?
a)
Both the flower and the hummingbird are helped
b)
Both the flower and the hummingbird are harmed
c)
The flower is harmed, and the hummingbird is helped
d)
The flower is helped, and the hummingbird is harmed
8.
The diagram below shows feeding relationships among some organisms in an ecosystem. Which answer best describes the relationship between hawks and coyotes?
a)
Coyotes are parasites of hawks    
b)
Coyotes are predators of hawks 
c)
Coyotes and hawks are both prey 
d)
Coyotes and hawks compete for the same food
9.
Hailey is explaining commensalism to her friend. Which statement correctly describes commensalism?
a)
"Two organisms have a relationship in which both organisms benefit."
b)
“Two organisms have a relationship in which one organism benefits and the other is harmed."
c)
"Two organisms have a relationship in which they are both fighting for the same resources."
d)
"Two organisms have a relationship in which one benefits and the other is neither harmed nor helped."
10.
Remoras are small fish that attach to sharks but do not harm nor help them. When sharks tear prey apart, remoras eat the leftovers. What relationship do remoras have with sharks?
a)
Mutualism
b)
Parasitism 
c)
Commensalism 
d)
Symbiosis 
11.
Ticks are organisms that live on another organism, such as a deer, and drink its blood. The tick is harmful to the deer because it can cause diseases, such as Lyme disease. Which type of symbiotic relationship exists between the deer and the tick?
a)
Commensalism 
b)
Mutualism 
c)
Parasitism 
d)
Symbiosis 
12.
Ecological environments can be divided into different levels of organization. From the following choices, identify the correct order from largest to smallest.
a)
ecosystem, population, community, individual
b)
community, ecosystem, population, individual
c)
ecosystem, community, population, individual
d)
individual, population, community, ecosystem
13.
The lowest level of environmental complexity that includes living and nonliving factors is the _______.
a)
Biome
b)
Community 
c)
Ecosystem
d)
Habitat
14.
A word that means the same thing as consumer?
a)
Producer
b)
Autotroph
c)
Heterotroph
d)
Carbohydrate 
15.
Animals that get energy by eating the carcasses of other animals that have been killed by predators or have died of natural causes are called
a)
Scavengers
b)
Autotroph
c)
Herbivors
d)
Producers
16.
What are the three types of consumers?
a)
herbivore, carnivore and omnivore 
b)
herbivore, producer and omnivore 
c)
herbivore, carnivore and decomposer
d)
producer, carnivore and omnivore 
17.

Ecosystems have producers, decomposers and consumers. Carnivores and scavenger are both types of consumers in an ecosystem. Which of the following is a characteristic of scavengers that makes them different from carnivores?

a)

Scavengers eat only plant material

b)

Scavengers are omnivores that always eat live animals

c)

Scavengers are omnivores that eat dead plants and animals

d)

Scavengers are able to produce their own food when no other food is available

18.

Remoras are small fish that attach to sharks but do not harm them. When sharks tear prey apart, remoras eat the leftovers. What relationship do remoras have with sharks?

a)

Mutualism

b)

Parasitism

c)

Commercialism

d)

Predator-prey

19.

Honeybees are important pollinators of flowers. Mites that live in the bodies of bees can attack honeybee colonies. Some birds, amphibians and insects eat honeybees. Which of the following relationships is not included in the description above?

a)

Parasitism

b)

Mutualism

c)

Commensalism

d)

Predator-prey

20.

Which of the following are both abiotc factors in the mangrove ecosystem?

a)

Water and pelican

b)

Sun and rocks

c)

Pelican and crab

d)

Snail and waters

21.

Two types of global food webs show the feeding relationships of organisms. What distinguishes one type of global web from the other?

a)

Whether or not the food web includes tertiary consumers

b)

Whether the producers in the food web are located on land or in water

c)

Whether the web includes animals that migrate during the year

d)

Whether the ecosystem described by the web is localized or very broad.

22.

The interiors of some plants have tunnels and holes that ants can live in. These plants may also produce food on their leaves that ants like to eat. Which of the following is not a likely reason that some plants are adapted to attract ants?

a)

Ants could pollinate the plant's flowers.

b)

Ants could farm aphids, which eat the plant's sap.

c)

Ants could attack invaders that might eat the plant.

d)

Ants could die, adding nutrients to the soil below the plant.

23.

Devon noticed that it has rained much more this year than it did in each of the previous 10 years. How might this increase in rainfall affect populations in the area?

a)

Populations for whom water is limiting factor will increase in size

b)

Populations for whom water is a limiting factor will decrease in size

c)

Populations for whom water is not a limiting factor will increase in size.

d)

Populations for whom water is not a limiting factor will decrease in size.

24.

The Florida panther used to live in forests, prairies, and swamps over most of the southeastern U.S. Now it lives in the southern tip of Florida, south of the Caloosahatchee River. Based on this information, what is the most likely cause of the decline of the Florida panther population?

a)

The unintentional introduction of a larger predator

b)

The break-up of the panther's natural habitat by human settlement

c)

The weakening of species due to inbreeding

d)

competition for territory between panthers

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