Question #1:
Besides temperature, what other abiotic factor
greatly affects the amount of dissolved oxygen in a
body of water?
A. growth rate of populations
B. size of soil particles
C. length of light period
D. number of fish species
Question #2:
Why is it important for organisms to respond to
external environmental factors?
A. to maintain homeostasis
B. to increase tolerance of environmental
extremes
C. to adapt to their environment
D. to accelerate the process of natural
selection
Question #1:
Bacteria decompose dead matter by:
A. carrying out photosynthesis.
B. going through binary fission.
C. using plant & animal material as food.
D. reproducing rapidly.
Question #2:
How can viruses be treated medically to reduce their
numbers & prevent them from spreading?
A. Use antibiotics to kill them & use vaccines to
prevent them from spreading.
B. Use vaccines to kill them & use antibiotics to
prevent them from spreading.
C. Prevent them from spreading using vaccines,
but do not treat them with antibiotics.
D. Prevent them from spreading using
antibiotics, but do not treat them with vaccines.
Question #1:
A volcanic eruption devastates an area directly
southeast of a volcano. Which of the following
organisms would be the first to grow in this
area?
A. a shrubby bush
B. a hardwood tree
C. a climbing vine
D. a lichen
Question #2:
What term refers to the final stage of a forest’s
development?
A. pioneer species
B. secondary forest
C. climax community
D. conifer forest
Question #1:
When two organisms in a mutualistic
relationship are physically separated, which
of the following will most likely occur?
A. both organisms will become
parasites
B. one organism will consume the other
organism
C. one organism will benefit, but the
other will die
D. both organisms’ chances of survival
will be reduced
Question #2:
The roots of a mistletoe plant absorb
nutrients from living oak trees causing
some damage to the tissues of the trees.
This is an example of:
A. mutualism.
B. commensalism.
C. parasitism.
D. saprophytism.
Question #1:
Why are there more plant & animal species in tropical
rainforests than in deserts?
A. because there is more available water in
tropical rainforests
B. because there is too much sand in deserts
C. because there is more carbon dioxide in desert
atmospheres
D. because there is more sunlight in tropical
rainforests
Question #2:
A lichen results from an interaction between two
organisms, a fungus & an alga. The alga supplies food,
while the fungus traps water & keeps the alga moist.
This is an example of which of the following?
A. commensalism
B. mutualism
C. parasitism
D. predation
10%
90%
Question #1:
If an ecosystem contains 100 units of
energy at the producer trophic level, then it
will most likely contain about how many
units of energy at the secondary consumer
level?
A. 1
B. 10
C. 100
D. 1,000
Question #2:
Study the above illustration of a food web. What
would happen if coyotes were removed from the
ecosystem?
A. The population of hawks & snakes would
decrease.
B. The population of grasses & shrubs would
greatly increase.
C. The rabbit & rat population would greatly
decrease.
D. The rabbit & rat population would increase.
Question #1:
The desert tortoise feeds on prickly pear
cactus & other desert plants.
Which of these best describes the desert
tortoise in this desert community food web?
A. the desert tortoise is a herbivore
B. the desert tortoise is a producer
C. the desert tortoise is a predator
D. the desert tortoise is a carnivore
Question #1:
Some marine organisms participate in the
carbon cycle by using dissolved carbon
dioxide in photosynthesis. This process is
accompanied by which energy change?
A. solar energy being destroyed
B. solar energy being transformed into
matter
C. solar energy being split into its
component parts
D. solar energy being transformed into
chemical energy
Question #2:
All of the organisms in a typical
ecosystem are interdependent, helping to
maintain the equilibrium of the ecosystem &
sustaining each other. Which of the following
processes can bacteria perform that is not
possible for the other members of a typical
ecosystem?
A. converting radiant energy into
chemical energy
B. conserving water
C. using nitrogen from the atmosphere
D. decomposing the remains of dead
organisms
Question #1:
A person living near this pond wants to reduce the
mosquito population. The mosquito population in
this ecosystem could be reduced by:
A. planting more duckweed.
B. catching more minnows.
C. removing some martin houses.
D. adding more shelter for frogs.