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Unit Ecology Review

Total questions: 70

Worksheet time: 1hrs 19mins

Name
Class
Date
1.
At what stage does this population reach it's carrying capacity on the Demographic Transition Model
a)
1
b)
2
c)
3
d)
4
2.
Fungi are a  ________
a)
Autotrophs
b)
Heterotroopers
c)
Decomposers
d)
Primary Consumers
3.
Which these organism below is a primary consumer?
a)
Fungi
b)
Snake
c)
Ladybug
d)
Blue Jay
4.
An individual belonging to a specific species
a)
Biotic
b)
Community
c)
Organism
d)
Reptile
5.
All of the living and nonliving things in an area that interact with each other are called a/an ______.
a)
community
b)
habitat
c)
population
d)
ecosystem
6.
The living part of an ecosystem
a)
Biotic
b)
Abiotic
c)
Mother Earth
d)
Flowers
7.
The non-living part of an ecosystem
a)
Ocean
b)
Lava Flow
c)
Birds
d)
Abiotic
8.
Organisms that look similar and can produce fertile offspring
a)
Species
b)
Fish
c)
Community
d)
Trees
9.
Two or more members of a particular species living and interacting in the same area
a)
Community
b)
Population
c)
Organisms
d)
Biosphere
10.

What is the correct order for this food chain?

a)

Owl, Mouse, Grasshopper, Grass

b)

Grass, Mouse, Owl, Grasshopper

c)

Grass, Owl, Grasshopper, Mouse

d)

Grass, Grasshopper, Mouse, Owl

11.

Which of these organisms is the secondary consumer?

a)

Owl

b)

Mouse

c)

Grass

d)

Grasshopper

12.

Which of these organisms is the producer?

a)

Owl

b)

Mouse

c)

Grasshopper

d)

Grass

13.

What is the hawk in the food web?

a)

Producer

b)

Primary consumer

c)

Secondary consumer

d)

Tertiary consumer

14.
Series of steps in which organisms transfer energy by eating and being eaten
a)
foodweb
b)
consumer
c)
food chain
d)
omnivore
15.
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. 
16.
Which of the following leads to a decrease in biodiversity?
a)
protection of ecosystems
b)
pollution control
c)
selective cutting
d)
introduction of exotic or invasive species
17.
In the food web shown, the snail would be considered...
a)
primary consumer
b)
secondary consumer
c)
tertiary consumer
d)
producer
18.

symbiotic relationship in which both organisms benefit

a)

competition

b)

mutualism

c)

predation

d)

commensalism

19.

What are plants that convert energy from the sun called?

a)

decomposer

b)

primary consumer

c)

secondary consumer

d)

producer

20.
The shrew provides energy for the _______?
a)
cricket
b)
grasshopper
c)
frog
d)
snake
21.
Which organism recieves the least amount of energy from the producer?
a)
Owl
b)
Grasshopper
c)
Lilypad
d)
Mouse
22.

Rabbits introduced into Australia over 100 years ago have become a serious pest to farmers. Rabbit populations increases so much that they displaced many native species of plant eaters. What is the most logical explanation for their increased numbers?

a)

Rabbits have a high death rate.

b)

There are few effective predators.

c)

Additional rabbit species have been introduced.

d)

There is an increase in rabbit competitors.

23.
Non-living factor that affects an ecosystem
a)
biotic factor
b)
abiotic factor
c)
food chain 
d)
biome
24.
What is the original source of almost all energy in most ecosystems?
a)
carbohydrates
b)
sunlight
c)
water
d)
carbon
25.

In the woods, there are ducks and mice. They both compete for grasshoppers as the only source of food in that area at that time. The ducks outcompete the mice, and the mice die out in that area. This is an example of:

a)

Neutralism

b)

Commensalism

c)

The competitive exclusion principle

d)

Mutualism

26.

In the wild, some alligators gets their teeth cleaned by birds. The birds gets their food from the alligators' teeth.

What type of symbiosis is this?

a)

Mutualism

b)

Commensalism

c)

Parasitism

d)

Neutralism

27.

In this photo, what is an abiotic factor?

a)

Deer

b)

Grass

c)

rain

28.

The monkey would be a

a)

decomposer

b)

producer

c)

primary consumer

d)

secondary consumer

29.

Introduced species disrupt ecosystems because they are a/an

a)

Keystone Species

b)

Endemic Species

c)

Invasive Species

d)

Native Species

30.

Mice might grow in population and destroy the community by eating all of the berry bushes if

a)

wolves and snakes were removed from the food web

b)

another predator migrated in to the community

c)

the snake population grew

d)

none of these

31.

These organisms are often not shown in a food chain, but are important for recycling nutrients

a)

producers

b)

decomposers

c)

primary consumers

d)

carnivores

32.

A lion that eats a zebra that eats grass is a

a)

primary consumer

b)

secondary consumer

c)

tertiary consumer

d)

quaternary consumer

33.
What are the two parts of an ecosystem?
a)
water and sunlight
b)
all living and nonliving organisms
c)
producers and consumers
d)
soil and nutrients
34.
The process by which plants use sunlight to make sugar from water and carbon dioxide is called 
a)
pollination
b)
photosysthesis
c)
scavenging
d)
fertilization
35.
What do consumers give off that producers need?
a)
oxygen
b)
carbon dioxide 
c)
sugars
d)
heat
36.
A food web
a)
shows how energy is released by an organism
b)
compares the amount of energy at each level
c)
shows how different food chains in a community are linked together
d)
is unique since each organism can only be part of one food web
37.
An organism that uses what scavengers leave behind is a 
a)
herbivore
b)
carnivore
c)
decomposer
d)
omnivore
38.
What would most likely happen if the rabbit population was removed from the food chain grass —› rabbit —› fox?
a)
their would be more grass
b)
there would be less rabbits
c)
there would be more fox
39.
An organism that needs to eat other organisms to obtain energy is known as a:
a)
Autotroph
b)
Producer
c)
Consumer
d)
Mutualist
40.
What are the Abiotic factors in this image? 
a)
water, sunlight, dirt, air
b)
birds and plants
c)
birds, water, dirt
d)
plants, water
41.
What does fungi do to dead plants and animals?
a)
Leave them there
b)
Decompose them
c)
Wait for other animals to eat them
d)
Move away
42.
Which one is NOT an example of a decomposer?
a)
mushroom
b)
leaves
c)
mold
d)
worm
43.
What is a producer?
a)
an organism that gets energy from eating other organisms
b)
an organisms that uses sunlight to make its own food
c)
an organism that gets energy from eating dead organisms, non-living material or waste
d)
an organism that uses chemical energy to make its own food
44.

The number of pythons found throughout Everglades National Park has increased in recent years. These huge snakes are not native to Florida and are believed to have been released into the wild by pet owners. Wildlife biologists have initiated attempts to capture and remove these pythons. Which statement best explains the biologists’ reason for removing these pythons from the Everglades?

a)

The pythons could upset the territorial boundaries of native organisms.


b)

The pythons could adapt to overcome diseases common to native snakes.

c)

The pythons could prey on native organisms and cause native populations to decline.

d)

The pythons could begin to interbreed with native snakes and produce a more successful species.

45.

A new species of snake was introduced to a tropical region. Scientists then noticed a steady decline in the presence of field mice and an increase in the number of snakes. Which of these is the most likely explanation about why the population size of each animal changed?

a)

The snakes introduced to the region dominated the habitat, forcing the mice to find another place to live.

b)

The mice became prey to the introduced snakes, allowing the snake population to increase but decreasing the mice population.

c)

The snakes introduced to the region competed with the mice for food, allowing the snake population to increase but decreasing the mice population.

d)

The people in the surrounding area set traps that killed the mice, allowing the snakes to live without any predators and therefore to increase in number.

46.

The highest concentration of life exists in the top 200 meters of ocean water. What is the most important factor that influences the concentration of life?

a)

amount of gases at the surface

b)

amount of nutrients in the water

c)

large number of predators at lower depths

d)

amount of sunlight

47.

Rabbits introduced into Australia over 100 years ago have become a serious pest to farmers. Rabbit populations increases so much that they displaced many native species of plant eaters. What is the most logical explanation for their increased numbers?

a)

Rabbits have a high death rate.

b)

There are few effective predators.

c)

Additional rabbit species have been introduced.

d)

There is an increase in rabbit competitors.

48.

When the environment changes more quickly then a species can adapt to the changes, the species may become

a)

extinct

b)

diverse

c)

dominate

d)

overpopulated

49.
Which best describes what a food chain shows you?
a)
Energy flow through an ecosystem
b)
Food flowing through an ecosystem
c)
Consumers going into other consumers
d)
Who eats who
50.
In the food web shown, which is the tertiary consumer?
a)
large lizard
b)
snake
c)
scorpion
d)
desert fox
51.

What happens if a population grows past its carrying capacity?

a)

The population keeps growing

b)

The population starts to die off

c)

The entire species will go extinct

d)

The carrying capacity just increases

52.

Temperature, light, air, water, and soil are all _____ parts of the environment

a)

alive

b)

biotic

c)

abiotic

d)

living

53.

What is an example of a biotic factor?

a)

skunk

b)

rocks

c)

soil

d)

water

54.

What does biodiversity mean?

a)

Only one species in an area.

b)

The different amount of species in an area

c)

All abiotic life

d)

Nitrogen fixation

55.
Which of the following interactions is an example of symbiosis?
a)
an insect acts as a pollinator for a plant species
b)
a population of hummingbirds migrates during the summer
c)
a tropical bird performs a courtship dance for a mate
d)
a mother bear feeds and protects her cubs
56.
An increase in the atmospheric levels of carbon dioxide (CO2) is the biggest contributor to which of the following?
a)
El Nino
b)
global warming
c)
wind storms
d)
ozone depletion
57.
Which human activity has had the greatest impact on climate change?
a)
building skyscrapers
b)
deforestation
c)
burning fossil fuels
d)
production of nuclear waste
58.
The graph below shows population data for two species.  What can be said about the relationship between species 1 and species 2?
a)
When the population of species 1 increases, the population of species 2 decreases.
b)
The population of species 1 and species 2 stay the same over the time period shown.
c)
The population of species 1 is not influenced by the population of species 2.
d)
When the population of species 1 increases, the population of species 2 increases.
59.
Overpopulation occurs when a population exceeds its carrying capacity.  White-tailed deer are considered to be an overpopulated species in the central United States.  What is one consequence of white-tailed deer exceeding their carrying capacity?
a)
People don't see deer as often in urban areas.
b)
The deer are less healthy and more prone to disease.
c)
There are more predators to eat the deer.
d)
The deer have stopped breeding.
60.
After a natural disaster such as a hurricane or tornado, what will happen in the damaged ecosystem?
a)
Nothing; it will remain uninhabited.
b)
A new, different ecosystem will evolve.
c)
An ecosystem like the previous one will be re-established.
d)
No one really knows what to expect after a natural disaster.
61.

What is biodiversity?

a)

The different ways species reproduce

b)

The degree of variation of life on Earth

c)

A way to describe similarities between different species

d)

The process of creating new species

62.

Mice are living happily in a field at a carrying capacity. The owls that live near that field die of old age. Which graph below shows what would happen to the mice population?

a)
b)
c)
d)
63.

Which of the following is a true statement about biodiversity? Click all that apply.

a)

Having more species in an area always reduces the amount of resources available

b)

The more species there are in an area, the more likely it is that two species could have similar roles

c)

Having more species in an area makes the ecosystem more flexible to changes in climate

d)

Having more species in an area mean there is more food for predators.

64.
What is the name of an animal that is hunted and eaten by other animals?
a)
producer
b)
prey
c)
predator
d)
decomposer
65.
The concept that predators can affect the size and distribution of other animals is known as 
a)
predation
b)
herbivory
c)
tolerance
d)
limitation
66.
What is the term for each step in the transfer of energy and matter within a biological community?
a)
energy path
b)
food web
c)
trophic level
d)
food pyramid
67.

Which statement best describes the relationship between species A and B?

a)

Species A is the prey of Species B

b)

Species A is a parasite of Species B

c)

Species A is a consumer and B is a producer

d)

Species A and B has a mutualistic relationship

68.
Based on the food web shown above, which of the following is most likely responsible for the rabbit population trend as shown in the graph? 
a)
increase in amount of grass
b)
decrease in amount of grass
c)
overpopulation in squirrel population
d)
increase in rabbit population
69.

The trophic cascade in Yellowstone had many causes and affects. Which answer below most accurately shows the changes in the ecosystem due to the reintroduction of wolves?

a)

wolves reintroduced-> deer population increased -> tree and vegetation cover decreased

b)

wolves reintroduced-> beaver population decreased -> tree and vegetation cover increased

c)

wolves reintroduced-> deer population decreased -> tree and vegetation cover increased -> beaver population increased

d)

wolves reintroduced-> deer population decreased -> beaver population decreased -> songbird population increased

70.
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.

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