Nutritional
relationships between organisms are shown in the diagram below
1.
The mouse population would most likely decrease
if there were
(1) an increase in the frog and tree populations
(2) a decrease in the snake and hawk populations
(3) an increase in the number of decomposers in the area
(4) a decrease in the amount of available sunlight
Use
the food web below and your knowledge of biology to answer the following
questions.
3.
Which organisms feed on both
producers and
decomposers? (1) amphipods (2) crayfish
5.
What would happen to the diving beetle population if there were fewer
snails? Justify your response.
| 6.. A food pyramid is
represented by the diagram. Which statement best describes one of the
levels of this pyramid? (1.) The organisms in level B obtain food
directly from level A. (2.) Level D contains the greatest number
of heterotrophs in the pyramid. (3.) level C contains the largest
group of consumers in the pyramid. (4.) Level A contains the
largest producers in the pyramid. 7. The secondary consumers in this pyramid would be found at level (1.) A (2.) B (3.) C (4.) D |
 |
| 8. Which level of this
pyramid would contain producer organisms? (1.) A (2.) B
(3.) C (4.) D 9. If birds eat insects that feed on corn, which pyramid level would birds occupy? (1.) A (2.) B (3.) C (4.) D 10. As one progresses from level D to level A in this pyramid, the amount of stored energy (1.) increases (2.) decreases (3.) remains the same |
 |
11.
Population A
is made up of living
animals. The members of population B
feed on these
living animals. The members of population B
are most likely
(1) scavengers
(2) autotrophs (3)
predators (4) parasites
12.
Identify one heterotroph from the
food web that could be a member of population A.
Use
the previous diagram and the energy pyramid below to answer question 13.
An energy pyramid is shown below.
13.
Identify one organism shown in the food web that would be found at level X.
Use the diagram below and your knowledge of biology to answer questions 14 and
15 which follow.
14. What do the arrows represent in this energy pyramid?
15. Identify an autotroph in this energy pyramid.
Use the energy pyramid below to answer questions 16 through 18. An
energy pyramid is represented below
Identify
feeding levels A, B, C in this pyramid.
16. Level A =
17. Level B =
18.
Level C =
19. Explain why the mass of the organisms decreases as you move up this energy pyramid.
Base
your answers to questions 20 and 21 on the information below and on your
knowledge of biology.
Analysis of a sample taken from a pond showed variety in both number and type of
20.
Identify the producer in this ecosystem.
21. If the frogs feed on insect
larvae, what is the role of the frogs in this pond ecosystem?
| 22. The pyramid illustrates some feeding relationships in alpine meadows of Yellowstone National Park. Which statement is best supported by the information shown in the pyramid? (1.) Chipmunks and insects can occupy the same niche. (2.) As the number of bears in this community increases, the number of chipmunks will increase. (3.) Insects are classified as omnivores in alpine meadow communities. (4.) Biomass decreases as energy is transferred from one level to another. |  |
| 23. Nutritional relationships between organisms are shown in the diagram. Which organisms are primary consumers? (1.) mouse, deer, and cricket (2.) deer, hawk, and mouse (3.) snake, hawk, and frog (4.) cricket, frog, and deer |  |
24. Which foods are derived from
organisms that occupy the level that contains the greatest
amount of energy in a biomass pyramid?
(1.) bread and tomatoes (2.) shrimp and rice
(3.) chicken and lettuce (4.)
hamburger and french fries
25. Explain why food chains are rarely more than four or five links in length.
| 26. Which organisms
would contain the greatest amount of available energy? (1.)
rabbits and deer (2.) grasses and shrubs (3.) hawks
(4.) lice
27. The primary consumers
include (1.) insects and seed-eating birds (2.) rabbits
and snakes (3.) rats and frogs (4.) spiders and coyotes |
 |
Base
your answers to questions 29 through 31 on the information below and on your
knowledge of biology.
A student uses a covered aquarium to study the interactions of biotic and
abiotic factors in an ecosystem. The aquarium contains sand, various water
plants, algae, small fish, snails, and decomposers. The water contains
dissolved oxygen and carbon dioxide, as well as tiny amounts of minerals and
salts.
29. Describe one
specific way the fish
population changes the amount of one
specific
abiotic factor (other than oxygen) in this ecosystem.
30.
Identify one source
of food for the decomposers in this ecosystem.
31.
Describe one
specific
way the use of this food by the decomposers benefits the
other
organisms in the aquarium.
32. The diagram below represents a pyramid of biomass in an aquatic
environment. Which statement best
explains why mass decreases from one
level to the next in this pyramid?
(1.) Organisms decay at each level, and thus less mass can be supported
at higher feeding levels.
(2.) Energy is lost to the environment at each level, so less mass can
be supported at
higher feeding levels.
(3.) When organisms die at higher levels, their remains sink to lower
levels, increasing
the mass at lower levels.
(4.) More organisms die at higher levels than at lower levels, resulting
in less mass at higher feeding levels.
33. Identify a producer in the energy pyramid above AND state a
life process carried on by this producer that is not carried on
by any of the consumers.
34. Two food chains are represented below.
Food chain A: aquatic plant
-->insect --> frog --> hawk
Food chain B: grass --> rabbit --> hawk
Decomposers are important for
supplying energy for
(1) food chain A, only (2) food chain B, only
(3) both food chain A and food chain B
(4) neither food chain A nor food chain B
Link to answers to this ecology
feeding quiz