Practice Questions for Exam 1
Instructions: Carefully read the
questions,
and decide on your answers. You can check your answers by
clicking
on "see the answers" at the bottom of the page.
1. Krill are small primary consumers in the
oceans that are consumed by a variety of organisms, one of which is the
largest organism that has ever existed, the blue whale.
Therefore,
the blue whale is a ?
a. primary
producer
d. tertiary consumer
b. secondary
producer
e. none of the above
c. primary consumer
2. A tornado rips through an area removing
all of the living material above the surface of the soil, but does not
remove any of the living things or seeds in the soil. What type
of
successional stage will develop first in this area?
a.primary
b.secondary c.
tertiary
d. quaternary e. climax
3. Which of the following is NOT a
characteristic
of a tropical rainforest?
a. the presence of a thick humus layer
b. the presence of high humidity
c. the presence of warm temperatures year
round
d. large amounts of rain
e. all of the above are characteristics of
rainforests
4. Rats tend to be found next to barns and
silos but not in the middle of fields. If you were studying a
population
of rats, and your study site consisted of an area with farm buildings
in
the middle of a 50 acre field, which of the following would best
describe
the population distribution of the rats in your population?
a. clumped b.
uniform
c. random d. none of the
above
e. both a and b
5. Which of the following are evergreen
forests
(those that do not drop all their leaves on a ìseasonalî
basis)?
a.tropical rainforest b.
temperate forest c. coniferous
forest
d. tundra e. both a and c
6. What is wrong (in an energy flow sense)
with
an ecosystem comprised of 50% primary producers, 2% tertiary consumers,
12% primary consumers, and 33% secondary consumers?
a. too many tertiary consumers
b. not enough primary producers
c. not enough tertiary consumers
d. not enough primary consumers
e. nothing is wrong with this ecosystem
because
there are enough primary producers, the most important level
7. A population of cockroaches in a
restaurant
starts with 100 individuals brought in with produce. In one
month,
1000 cockroaches are ìbornî, and 300 die. Assuming
that
the net reproductive rate remains constant, how many cockroaches will
there
be at the end of three months?
a. 700 b.
34,300
c. 2100 d. 1,000,000
e.none
of the above