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Ecology

Total questions: 46

Worksheet time: 54mins

Name
Class
Date
1.
Which is an abiotic factor that most limits the number of frogs living in a pond? 
a)
the color of the water 
b)
the number of predators 
c)
the temperature of the water 
d)
the populations of producers 
2.
Field mice are the primary food source for horned owls in an area. Due to a drought, many field mice left the area. Which result would this drought most likely have on the horned owls?
a)
The horned owl population will consume more field mice.
b)
Horned owls will follow the field mice to a different area.
c)
The horned owl population will increase in the area.
d)
Horned owls will change to a plant-based diet.
3.

All organisms of a species that live in the same place at the same time is called

a)

species

b)

predation

c)

population

d)

habitat

4.

Living parts of an ecosystem are called...

a)

species

b)

abiotic factors

c)

biotic factors

d)

population

5.

Examples of autotrophs are...

a)
b)
c)
d)
6.

What percentage of energy is passed from one trophic level to the next trophic level?

a)

About 25% of the energy is passed to the next trophic level.

b)

Only about 10% of the energy at one level is passed to the next.

c)

About 50% of the energy is passed

d)

50% of energy is passed from one trophic level to the next

7.
How many carnivores are shown in this food web?
a)
6
b)
4
c)
5
d)
3
8.
Which of the following is a herbivore?
a)
cricket
b)
frog
c)
hawk
d)
shrew
9.
The rabbit in this food web would be considered a:
a)
Decomposer
b)
Producer
c)
Secondary Consumer
d)
Primary Consumer
10.

The meanings of the terms habitat and niche are often confused or are intertwined. Which of the following describes the difference between these two terms?

a)

A niche is the place where an organism lives. A habitat is the job or role of an organism.

b)

A habitat has to do with how the organism interacts with its environment. A niche is the job or role of an organism.

c)

A habitat is a place where an organism lives. A niche is the job or role of an organism.

d)

A niche involves the food, water, and shelter that an organism has access to. A habitat is a place where an organism lives.

11.

Mushrooms and bacteria are considered _____________, which are organisms that break down decaying organisms.

a)

consumers

b)

decomposers

c)

producers

d)

herbivores

12.
Where does photosynthesis take place? 
a)
in the chloroplast of a plant cell
b)
in the mitochondria of a plant cell
c)
in the mitochondria of an animal cell
d)
in the chloroplast of an animal cell
13.
What may happen if the snowshoe hare was removed from the food web pictured?
a)
The insects in the habitat would increase.
b)
The shrew population would decrease due to being only hawk food source.
c)
The willow tree population would decrease.
d)
Foxes would dies due to no food source. 
14.

An energy pyramid represents what?

a)

How much energy a particular organism needs.

b)

How much sunlight is available for the ecosystem to use.

c)

How much energy is needed to build a pyramid.

d)

The amount of energy available to the next 'feeder' in a food web.

15.
What statement is TRUE about the graph?
a)
The prey is the green line because there needs to be more prey than predators.
b)
The prey is the red line because there needs to be more predators than prey.
c)
The green line is the producers
d)
The red line is the producers
16.
What would the carrying capacity of this graph be
a)
530
b)
400
c)
500
d)
480
17.

According to the graph, what is causing the deer population to decrease

a)

They got sick

b)

The wolf population is decreasing

c)

The wolf population increased

d)

They ran out of food

18.
Which symbiosis is represented in the picture? 
a)
parasitism 
b)
mutualism
c)
commensalism
d)
nonalism 
19.
A symbiotic relationship in which both organisms benefit:
a)
Competition.
b)
Mutualism.
c)
Commensalism.
d)
Parasitism.
20.
This is known as a relationship in which both organisms involved benefit. 
a)
Predator-Prey
b)
Commensalism
c)
Mutualism
d)
Decomposition
21.

Which pattern is found in the graph?

a)

The populations do not show a similar pattern

b)

The populations cycle opposite of each other about every 10 years. When one increases, the other decreases

c)

The populations cycle with each other about every 10 years. When one increases, the other also increases

22.

90% of the energy that gets lost as you move up a food pyramid or chain gets lost as

a)

pollution to the environment

b)

heat to the environment

c)

energy for decomposers

d)

gets recycled

23.

When two or more organisms depend upon one another

a)

mutualism

b)

commensalism

c)

interdependent

d)

parasitism

24.

An organism that is being hunted or eaten

a)

organism

b)

abiotic

c)

predation

d)

prey

25.
In the energy pyramid here, which organisms have the most energy available?
a)
Producers
b)
Carnivores
c)
Herbivores
d)
Top Predator
26.
A food pyramid represent the relative amount of energy in trophic levels. Which of the following correctly shows a food pyramid?
a)
A
b)
B
c)
C
d)
D
27.

Small openings on a leaf- O2, oxygen and CO2 carbon dioxide can move

a)

product

b)

stomata

c)

roota

d)

glucose

28.

What are the two products of photosynthesis?

a)

Glucose

b)

Oxygen

c)

Carbon Dioxide

d)

Water

e)

Light

29.
Which of the following is the correct equation for PHOTOSYNTHESIS?
a)
CO2 + light + H2O --> O2 + Sugar
b)
CO2 + sugar + H2O --> O2 + light
c)
O2 + light + H2O --> CO2 + Sugar
d)
CO2 + O2 + H2O --> Light+ Sugar
30.

A species that plays a critical role in the health, maintenance, growth, or definition of an ecosystem.

a)

keystone

b)

invasive

c)

engineer

d)

predator

31.
Keystone species is
a)
A species that is endangered
b)
A species that influences the survival of many other species in an ecosystem
c)
A species that emigrates from an ecosystem
d)
A species that does not help the ecosystem
32.

Which of the following would be the most likely effect, if there were a sudden increase in the cricket population?

a)

There would be a decrease in the small bird population.

b)

There would be a decrease in the grass/flowers population.

c)

There would be a decrease in the mice population.

d)

There would be an increase in the grass/flowers population.

33.

When there is higher biodiversity...

a)

more organisms are likely to die because they can't adapt to environmental changes.

b)

there is more diversity and higher sustainability of life.

c)

there is less diversity.

d)

there is more diversity and lower sustainability of life

34.

Biodiversity is affected by pollution.

a)

True

b)

False

35.

Who are the primary consumers in this food web?  

a)
The lizard and the Hawk
b)
The Grasshopper and the Mouse
c)
The rabbit and the Hawk
d)
The lizard and the snake
36.
What level consumer could you consider the deer?  
a)
Primary
b)
Secondary
c)
Tertiary
d)
Quarternary
37.

A scientist was studying a population of fish in a pond over a period of 10 years. He observed that the population increased each year for 3 years, and then remained nearly constant for the rest of the study. The best explanation for this observation is that the population had

a)

stopped reproducing

b)

reached carrying capacity

c)

mutated into a different species

d)

run out of food and all died

38.

Predator population lags behind prey population because:

a)

Increase in predators leads to decrease in prey

b)

Increase in predators leads to increase in prey

c)

Increase in predators leads to decrease in producers

39.
A change in an organism's surroundings that causes it to react is called
a)
a stimulus.
b)
a response.
c)
development. 
d)
energy.
40.
In the word BIOLOGY, the prefix BIO means
a)
the study of...
b)
life, living
c)
organism
d)
biology
41.

Read the following statement and choose which characteristic of living things it describes. A caterpillar eats the leaves of a plant.

a)

Obtain and use energy

b)

Respond to a Stimulus

c)

Grow and Develop

d)

Reproduce

42.
What is the name and function of the organelle displayed above?
a)
Mitochondria: breakdown glucose and produce ATP
b)
Chloroplast: converts solar energy into chemical energy
c)
Vacuole: Stores H2O, salt, food
d)
Nucleus: stores genetic information
43.

This refers to the total disappearance of all the members of a particular group of species.

a)

Extinction

b)

Biodiversity

c)

Natural Selection

d)

Disappearance

44.

Why are mushrooms important to the food chain?

a)

They recycle nutrients into the ecosystem.

b)

They produce food energy for other living things.

c)

They recycle oxygen into the atmosphere.

d)

They consume excess herbivores in the ecosystem.

45.
If the population of a certain predator increases, there is often _______ its prey
a)
a decrease the population of
b)
an increase of the population of 
c)
great news for its prey of
d)
no  impact found on
46.

What happens if an animals moves to a new habitat, and cannot get its basic needs of food, water, shelter, and space?

a)

Nothing

b)

Extinction

c)

The animal will adapt no matter what

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