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Ecology_2025_Eilers

Total questions: 54

Worksheet time: 46mins

Name
Class
Date
1.

Photosynthetic microscopic protists, such as algae acting as the primary producers in aquatic ecosystems. 

a)

Detritivores

b)

Zooplankton

c)

Phytoplankton

d)

Pioneer Species

2.

Organism that is the first to live in a previously uninhabited area (lichens, moss)

a)

Individual

b)

Biome

c)

Population

d)

Pioneer Species

3.

Microscopic, free-floating animal like protist acting as primary consumers in aquatic ecosystems

a)

Chemosynthesis

b)

Pioneer Species

c)

Zooplankton

d)

Phytoplankton

4.

Reestablishment of a damaged ecosystem in an area where the soil was left intact

a)

Biogeochemical cycle

b)

Primary Succession

c)

Secondary Succession

d)

Limiting Factor

5.

Establishment and development of an ecosystem in an area that was previously uninhabited

a)

Pioneer species

b)

Secondary Succession

c)

Primary Succession

d)

Symbiosis

6.

The process by which certain types of bacteria convert gaseous nitrogen into nitrogen compounds

a)

Nitrogen Fixation

b)

Biogeochemical Cycles

c)

Biomass Pyramid

d)

Predation

7.

Ecological relationship in which one organism benefits by harming another organism. 

a)

Predation

b)

Parasitism

c)

Commensalism

d)

Mutualism

8.

Ecological relationship in which one species receives a benefit but the other species is not affected one way or another.

a)

Predation

b)

Parasitism

c)

Commensalism

d)

Mutualism

9.

All of the physical, chemical, and biological factors that a species needs to survive, stay healthy, and reproduce in an ecosystem. If these overlap for organisms then competition between them will increase. 

a)

Commensalism

b)

Ecological Niche

c)

Symbiosis

d)

Predation

10.

Process by which one organism hunts and kills another organism for food

a)

Predation

b)

Parasitism

c)

Symbiosis

d)

Competition

11.

Ecological relationship in which two organisms attempt to obtain the same resource

a)

Parasitism

b)

Symbiosis

c)

Competition

d)

Predation

12.

Organism that eats dead organic matter. Examples would be earthworms, millipedes, termites, and large mushrooms.  

a)

Omnivore

b)

Herbivore

c)

Carnivore

d)

Detritivore

13.

Level of nourishment in a food chain, food web, or ecological pyramid

a)

Habitat level

b)

Biogeochemical level

c)

Biome level

d)

Trophic level

14.

A type of detritivore that breaks down organic matter into simpler compounds, returning nutrients back into an ecosystem. An example would be the microorganisms of certain types of bacteria, protozoa, and fungi.

a)

Decomposer

b)

Omnivore

c)

Carnivore

d)

Herbivore

15.

Organism that eats both plants and animals 

a)

Carnivore

b)

Omnivore

c)

Detritivore

d)

Herbivore

16.

Variety of life within an area

a)

Food Web

b)

Biotic

c)

Biogeochemical cycles

d)

Biodiversity

17.

Organism that obtains energy by eating only animals

a)

Decomposer

b)

Detritivore

c)

Carnivore

d)

Herbivore

18.

Nonliving factor in an ecosystem, such as moisture, temperature, wind, sunlight, soil, and minerals. 

a)

Abiotic

b)

Community

c)

Biome

d)

Biotic

19.

Organisms that only eat plants

a)

Detritivore

b)

Omnivores

c)

Carnivores

d)

Herbivores

20.

Organism that obtains its energy and nutrients by consuming other organisms. 

a)

Detritivore

b)

Decomposer

c)

Autotroph/Producer

d)

Heterotroph/Consumer

21.

Organisms that obtain its energy from abiotic sources, such as sunlight

a)

Detritivore

b)

Decomposer

c)

Autotroph/Producer

d)

Heterotroph/Consumer

22.

Living things, such as plants, animals, fungi, and bacteria. 

a)

Food Chain

b)

Biome

c)

Biotic

d)

Abiotic

23.
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
24.
If these organisms were arranged in a food pyramid, which organism would have the least amount of total energy available?
a)
coyote
b)
insect
c)
lizard
d)
shrub
25.

A food web has arrows. The arrow shows:

a)

The direction of energy flow (from predator TO prey)

b)

The direction of energy flow (from prey TO predator)

c)

The biomass at each trophic level

d)

Possible feeding relationships

26.

The average amount of energy that does not transfer to a predator, since it was used up, is (a)   %.

27.
Bacteria and fungi typically serve what role in an ecosystem?
a)
herbivore
b)
carnivore
c)
omnivore
d)
decomposer
28.
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
29.
The rabbit in this food web would be considered a:
a)
Decomposer
b)
Producer
c)
Secondary Consumer
d)
Primary Consumer
30.
The fox in this food web would be considered a:
a)
Tertiary Consumer
b)
Producer
c)
Secondary Consumer
d)
Primary Consumer
31.
Which organism on the food web is an omnivore?
a)
Snake
b)
Mouse
c)
Grasshopper
d)
Green Plant
32.
Where does the energy start in this food chain?
a)
Plant
b)
Sun
c)
Deer
d)
Wolf
33.
A tick and a dog have this type of relationship.
a)
mutualism
b)
commensalism
c)
neutralism
d)
parasitism
34.
A tapeworm inside a dog is
a)
competition
b)
predation
c)
commensalism
d)
parasitism
35.
A symbiotic relationship that involves species having to fight for something they both need or want
a)
competition
b)
predation
c)
commensalism
d)
parasitism
36.
Plants both trying to get sunlight are 
a)
commensalism
b)
mutualism
c)
compeition
d)
parasitism
37.
Which of the following best describes the small bird in the food web above?
a)
primary and secondary consumer
b)
secondary and tertiary consumer
c)
primary consumer only
d)
secondary consumer only
38.
Which organism do the owl and the weasel compete for in the food web?
a)
Hawk
b)
Spider
c)
Grasshopper
d)
Shrew
39.
A frog eats a fly. The frog and fly are demonstrating ________.
a)
mutualism
b)
competition
c)
predator/prey
d)
parasitism
40.
What is the only process that removes carbon from the atmosphere?
a)
combustion
b)
cellular respiration
c)
photosynthesis
d)
decomposition
41.

Which cycle are fossil fuels (oil, coal, natural gas) part of?

a)

carbon

b)

water

c)

nitrogen

d)

phosphorus

42.
Identify the cycle pictured.
a)
The Water cycle
b)
The Carbon cycle
c)
The Nitrogen cycle
d)
The Phosphorus cycle
43.

Identify the cycle pictured.

a)

The Water cycle

b)

The Carbon cycle

c)

The Nitrogen cycle

d)

The Phosphorus cycle.

44.

Burning (combustion) fossil fuels has which effect in the carbon cycle?

a)

It removes carbon dioxide from the atmosphere.

b)

It puts carbon dioxide under the ground.

c)

It adds carbon dioxide to the atmosphere.

d)

It has no effect in the carbon cycle.

45.

Cellular Respiration is the process by which animals take in _____ and release _____.

a)

photosynthesis, air

b)

carbon, oxygen

c)

oxygen

d)

oxygen, carbon dioxide

46.

Which of the following cycles needs different types of bacteria to make the most common gas in the atmosphere useful to plants?

a)

the water cycle

b)

the carbon cycle

c)

the nitrogen cycle

d)

the hydrogen cycle

47.
Which process takes carbon dioxide out of the atmosphere?
a)
respiration
b)
combustion
c)
decomposition
d)
photosynthesis
48.

How do animals (consumers) get the carbon and nitrogen they need?

a)

From the air they breathe

b)

From the water they drink

c)

From the food they eat

d)

From the sun

49.

After land is cleared for farming, what type of succession might occur?

a)

Primary

b)

secondary

c)

tertiary

50.
After a forest fire, an ecosystem would start regrowth through -
a)
primary succession
b)
secondary succession
c)
climax community
d)
limiting factors
51.
What is formed during primary succession that doesn't need to be formed during secondary succession?
a)
pioneer species
b)
soil
c)
climax community
d)
lichens
52.
Which catastrophic event will most likely have the effect of returning an ecosystem to primary succession?
a)
A tornado
b)
A volcanic eruption
c)
A flood
d)
A drought
53.
starts with bare rock followed by lichen
a)
primary succession 
b)
secondary succession
c)
both types of succession
54.

After a volcanic eruption, lava covers the land. What is the order that plants grow to repopulate the area?

a)

Lichens → Shrubs → Grasses → Trees

b)

Lichens → tree → shrubs→Grasses

c)

Grasses → Lichens → Shrubs → Trees

d)

Lichens → Grasses → Shrubs → Trees

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