Which of the following best explains why there are seldom more than five trophic levels in a food chain?
Most carnivores function at more than one trophic level
Trophic levels about this numbers contain too many individuals
Energy is lost from each trophic level
The ecosystem contains too much biomass
2. Multiple Choice
30 seconds
1 pt
J-Shaped curves
show a decline after an increase
display populations that have reached carrying capacity
represent exponential growth
does not depend on the numbe rof resources
3. Multiple Choice
1 minute
1 pt
A herd of zebras would be considered a
community
species
ecosystem
population
4. Multiple Choice
30 seconds
1 pt
Two organisms of different species exist in a relationship in which each individual benefits from the activity of the other:
commensalism
parasitism
herbivory
mutualism
5. Multiple Choice
30 seconds
1 pt
All of the following are density-dependent factors that limit animal populations EXCEPT.
weather
predation
food competition
birthrate
6. Multiple Choice
1 minute
1 pt
This population pyramid shows that
the Ukraine population is in a rapid decline
the Ukraine population is in a rapid increase
the Ukraine population is in a stable and steady state
men outlive women in the Ukraine
7. Multiple Choice
1 minute
1 pt
Where an organism lives is its -
niche
ecosystem
habitat
home
8. Multiple Choice
1 minute
1 pt
Which organism contains the most energy?
Rabbit
Grains
Birds
Mice
9. Multiple Choice
30 seconds
1 pt
Which of the following is a primary consumer in this food web?
Foxes
Carrots
Mice
Owls
10. Multiple Choice
1 minute
1 pt
Which of the following is an autotroph?
Carrots
Birds
Mice
Grasshopper
11. Multiple Choice
1 minute
1 pt
Which of the following is an omnivore?
Rabbit
Carrots
Owls
Birds
12. Multiple Choice
1 minute
1 pt
Which organism is a carnivore?
Birds
Rabbits
Foxes
Grains
13. Multiple Choice
1 minute
1 pt
Which organism is an herbivore?
Mice
Foxes
Birds
Grains
14. Multiple Choice
1 minute
1 pt
What type of organism recycles energy back into an ecosystem?
Herbivore
Carnivore
Autotroph
Decomposer
15. Multiple Choice
1 minute
1 pt
What would happen in the case of a drought?
iguanas would increase
Eagles would increase
grass would increase
all organisms would decrease
16. Multiple Choice
1 minute
1 pt
What happens to the populations as you move up a population pyramid?
Populations increase
Populations decrease
Populations remain the same
Populations fluctuate
17. Multiple Choice
30 seconds
1 pt
Which point on the graph represents carrying capacity?
A
B
C
D
18. Multiple Choice
30 seconds
1 pt
What types of organisms indicate primary succession is taking place?
Trees and flowering plants
Bears, deer, and rabbits
moss, lichens, and insects
grasses, shrubs, and birds
19. Multiple Choice
1 minute
1 pt
What do decomposers (bacteria and fungi) do in an ecosystem?
They return nutrients to the soil
They take nutrients OUT of the soil
They return energy to the soil
They make energy
20. Multiple Choice
1 minute
1 pt
How do Matter and Energy flow differently?
Energy flows in one direction, matter is recycled
Matter flows in one direction, Energy is recycled
Energy and Matter are both recycled
Energy and Matter both flow in one direction
21. Multiple Choice
30 seconds
1 pt
Nitrogen Fixation is carried out by
bacteria
plants
herbivores
mushrooms
22. Multiple Choice
1 minute
1 pt
Since wind, water, and temperature are NOT living they are considered
Abiotic Factors
Biotic Factors
23. Multiple Choice
1 minute
1 pt
If all ______________ were removed from an ecosystem, no other organisms would have any energy.
Herbivores
Producers
Carnivores
Decomposers
24. Multiple Choice
1 minute
1 pt
There are 200 bears in an area. 10 emigrate, 15 immigrate, 10 are born and 20 die. How many are left?
195
205
200
260
25. Multiple Choice
1 minute
1 pt
A species that is introduced to another environment that causes problems with the native food web is called a(n)...
invasive species
destructive species
herbivores
omnivores
26. Multiple Choice
1 minute
1 pt
Biodiversity is the measure of all of ________________.
ALL organisms including plants, animals, decomposers, etc.
only plants
only animals
only bacteria
27. Multiple Choice
30 seconds
1 pt
Why is only 10% of the energy passed along to the next trophic level?
90% is lost through heat, reproduction, and movement
90% is gained
90% is lost in light energy
because only 10% is lost
28. Multiple Choice
2 minutes
1 pt
The illustrations below show the age and sex of the human populations in Country 1 & Country 2. The ages are grouped by -year classes, and the sexes are represented separately. The percentages in the different age classes are shown by the relative widths of successive horizontal bars. In country 1, approximately what percentage of the individuals were younger than fifteen years of age?
10%
21%
42%
52%
29. Multiple Choice
30 seconds
1 pt
During the carbon cycle, which of the following carbon compounds would be utilized as an energy source by heterotrophs?
carbonic acid
organic molecules
carbon dioxide
carbon monoxide
30. Multiple Choice
1 minute
1 pt
All of the following statements concerning characteristics of predator-prey relationship are correct EXCEPT:
Camouflage is an adaptation that protects prey.
A rise in the population of predators is followed by a decreased in the population of prey.
A rise in the population of prey is often followed by a rise in the population of predators.
The population of predators most often eliminates the population of prey
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