Download How Do Organisms in an Ecosystem Interact

How Do Populations Change Over Time?
Pre-Post Test 2
1.
The ecosystem MOST likely to be found in the Great Lakes region is_______.
A.
B.
C.
D.
bass, frogs, ducks and maple trees
starfish, lobster, herons and coral reef
polar bear, sea lions, penguins and walrus
alligators, snakes green turtles and mangrove trees
2.
Monarch butterflies are toxic to birds because monarch caterpillars eat milkweed. Viceroy
butterflies closely resemble monarchs, but are not toxic since their caterpillars do not eat
milkweed. This similarity in appearance developed because viceroy butterflies that closely
resembles monarch’s are____.
A.
B.
C.
D.
less likely to mate with monarchs
more likely to mate with monarchs
more likely to eat milkweed
less likely to be eaten by birds
3.
Cattle eat a diet of grass; however cattle can not digest the cellulose in grass. Bacteria and
protozoa live in the stomach of the cattle. These organisms change the cellulose to sugar a
substance the cattle can now use for food. The cattle provide food and shelter for the bacteria
and protozoa. The type of relationship between the cattle and the bacteria and protozoa inside
the cattle stomach is an example of______.
A.
B.
C.
D.
predation
mutualism
commensalism
parasitism
1-Test 2
How Do Populations Change Over Time?
4.
A tiger is born with white fur instead of fur that is brownish-orange with black stripes. How
could this affect the tiger?
A.
B.
C.
D.
It probably wouldn’t affect the tiger at all.
A lack of stripes could help the tiger stay warmer.
A lack of camouflage could make capturing prey more difficult.
A lack of camouflage could help in capturing more prey.
5.
What would MOST likely happen to a tree squirrel that was born unable to climb trees?
A.
B.
C.
D.
It would learn to fight off predators.
It would learn how to fly
It would survive to reproduce.
It would be eaten by a predator.
6.
Look at the diagram of the aquatic environment which organism provides nutrients for the largest
numbers of other organisms?
A.
B.
C.
D.
herring
snapper
bluefish
seal
2-Test 2
How Do Populations Change Over Time?
7.
When a population of the animal (x) was introduced into a community the number of lions
increased while the number of antelopes decreased. Animal (x) could be a _________.
A.
B.
C.
D.
herbivore
omnivore
carnivore that is a predator of antelopes but a prey of the lions
carnivore that is a predator of antelopes and lions
8.
If there is a shortage of antelopes in the area what might the lion do?
A.
B.
C.
D.
Become a herbivore
Become an omnivore
Die off
Hunt for other animals
9.
Charles Darwin based his theory of evolution on his observations of nature. Which observation
contributed to his theory is illustrated by this population of beetles?
A.
B.
C.
D.
Populations remain stable over time.
Individuals within a population may vary widely.
Species produce more offspring than can survive.
Environmental resources are limited.
3-Test 2
How Do Populations Change Over Time?
10.
Most populations introduced into a new ecosystem grow until limiting factors such as lack of
food; water and space hinder their growth, as illustrated above. What does the portion of the
graph labeled B represent?
A.
B.
C.
D.
Birthrate decrease
Death rate increase
Slowing growth
Exponential growth
11.
Many residents in a small town have developed a bacterial infection. Two students hypothesized
that the bacteria is from the town’s drinking water. They looked for the bacteria in water
samples from the lake that supplies over eighty percent of the town’s drinking water. When they
find no bacteria, the students conclude that the town’s residents are not getting the bacteria from
the drinking water. Which is a source of error in the student’s experimental design?
A.
B.
C.
D.
Water from the lake was not tested for other possible pathogens.
The resident’s genetic predisposition for getting ill was not determined.
Residents of other nearby towns were not tested for the bacteria.
Other sources for drinking water were not tested for the bacteria.
12.
For decades Great Lakes water quality has been threatened by toxic pollution through direct
dumping, such as paper mill waste or indirect pathways, such as groundwater run-off. This
pollution can remain in the system for years. Which of these pollutants would MOST likely be a
cause of bacteria in the water?
A.
B.
C.
D.
DDT
PCB
Sewer overflows
Mercury
13.
All of the following are reasons for habitat protection EXCEPT _______.
A.
B.
C.
D.
organism do not live independently
provides humans better habitat to hunt in
the balance of nature would be disrupted
protecting the habitat helps to protect the species
14.
Which of these is NOT considered to be polluting?
A.
B.
C.
D.
using solar power
burning fossil fuels
using natural gas
burying trash in a landfill
4-Test 2
How Do Populations Change Over Time?
15.
The maximum number of organisms an environment can support is called the ______.
A.
B.
C.
D.
limiting factor
carrying capacity
biodiversity
fertility rate
16.
Decomposers cause dead organisms to ______.
A.
B.
C.
D.
germinate
reproduce
molt
decay
17.
Which of the following is returned to the environment by decomposers?
A.
B.
C.
D.
oxygen
sugar
nitrogen
hydrogen
18.
Which of these organisms is NOT a decomposer?
A.
B.
C.
D.
mold
vulture
bacterium
mushroom
19.
Which of the following is the BEST example of an adaptation?
A.
B.
C.
D.
Owls having large eyes so they can see better at night
Hummingbirds having to eat once every three minutes
trained dogs returning a ball when it is thrown
sea world seal balancing a ball on its nose
20.
Which of the following statements about extinction is NOT true?
A.
B.
C.
D.
Extinction is still happening today.
Extinct animals can be studied using fossils.
Extinct plants are very different from all plants living today.
Extinction can be caused by disease.
5-Test 2
How Do Populations Change Over Time?
21.
Which of the following may be one reason for animal extinction?
A.
B.
C.
D.
There is too much food available for them.
Their habitat is taken or changed by humans.
They have enough room to live in.
The environment is correct for them.
22.
A population of moths has wing patterns that look like tree bark. How could this affect the
moths?
A.
B.
C.
D.
The camouflaged moths would be easier for predators to find and eat.
The population would decrease because male moths can’t see the female moths.
The moth population would not be affected.
The camouflaged moths probably would not be eaten by predators.
23.
“Survival of the fittest” means that _________.
A.
B.
C.
D.
the more offspring an organism has, the longer it will live
the faster the organism, the longer it will live
organisms that have the traits necessary to adapt will survive
the faster the organism, the longer it will live
24.
After an old abandon building was torn down, the surface was left with nothing but soil and
rocks. Several months later grass, small shrubs and flowers had began to grow. This gradual
change in an ecosystem in which one community is replaced by another is called?
A.
B.
C.
D.
survival of the fittest
succession
symbiosis
conservation
6-Test 2
How Do Populations Change Over Time?
How Do Populations Change Over Time?
Pre-Post Test Answer Key
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
A
D
B
C
D
B
C
D
B
D
D
C
B
A
B
D
C
B
A
C
B
D
C
B
7-Test 2
How Do Populations Change Over Time?