Chapter 28:
Ecosystems
Practice Test
1.
What describes how an organism fits into its ecosystem?
a.
its trophic level
b.
its nest
c.
its niche
d.
its job
Hint
2.
What is a relationship in which one organism benefits and the other is neither harmed nor helped?
a.
commensalism
b.
parasitism
c.
predation
d.
mutualism
Hint
3.
What is a consumer that eats both plants and animals?
a.
a producer
b.
a carnivore
c.
an omnivore
d.
a herbivore
Hint
4.
What is a relationship in which one organism benefits but the other is harmed in some way?
a.
predation
b.
mutualism
c.
commensalism
d.
parasitism
Hint
5.
What are the relationships between or among different organisms?
a.
biotic factors
b.
a community
c.
an ecosystem
d.
abiotic factors
Hint
6.
What is the process in which minerals are dissolved out of rock and soil by water?
a.
acid precipitation
b.
leaching
c.
decomposition
d.
topsoil formation
Hint
7.
What are all the populations of organisms living in the same area at the same time?
a.
an ecosystem
b.
abiotic factors
c.
trophic levels
d.
a community
Hint
8.
Which of these is NOT a reason that water is crucial for organisms?
a.
It is a major component of cytoplasm and the fluid that bathes cells.
b.
It is the substance in which metabolic reactions take place.
c.
It is a needed reactant for photosynthesis.
d.
It is the source of energy for almost all ecosystems.
Hint
9.
What is a period of summer dormancy in animals?
a.
hibernation
b.
sleep
c.
predation
d.
estivation
Hint
10.
What are physical aspects of the environment, such as temperature and wind?
a.
abiotic factors
b.
niches
c.
biotic factors
d.
a community
Hint
