Chapter 16:
Ecosystems
Practice Test
1.
A close association of two or more species is called __________.
a.
symbiosis
b.
parasitism
d.
all of the above
Hint
2.
What type of relationship exists between a mosquito and a human?
a.
parasitism
b.
predator/prey
c.
mutualism
d.
commensalism
Hint
3.
What is the presence of many different species in an area called?
a.
an environment
b.
a population
c.
succession
d.
diversity
Hint
4.
A relationship where one organism benefits and the other is not helped or harmed is called __________.
a.
commensalism
b.
mutualism
c.
parasitism
d.
predator/prey
Hint
5.
If a species becomes extinct, what does that mean?
a.
The species is in hibernation.
b.
The species has moved to a different location.
c.
The species is in danger.
d.
The species completely disappears.
Hint
6.
What does the recovery of an ecosystem depend on?
a.
reproduction
b.
the weather
c.
sunlight
d.
species diversity
Hint
7.
What can humans do to prevent extinction?
a.
preserve natural resources
b.
learn how organisms interact with each other
c.
find alternatives to destroying habitats
d.
all of the above
Hint
8.
The first plants to appear in an area that is barren are called __________.
a.
pioneer species
b.
first arrivals
c.
climax communities
d.
annuals
Hint
9.
What is the difference between local and global extinction?
a.
Local extinction takes place in only one area; global extinction is worldwide.
b.
Global extinction often occurs as a part of succession.
c.
Local extinction happens only where you live.
d.
Humans cause local extinction, but not global extinction.
Hint
10.
Which of the following is an example of a pioneer species?
a.
pine trees
b.
cactus
c.
fern
d.
lichens
Hint
