Camas B Invitational
Ecology
12/11/2010
True/False
Indicate whether the sentence or statement is true or false.
_T___ 1. Dragons are apex predators.
_T___ 2. A pegasus and a unicorn could have developed through divergent evolution.
___F_ 3. If the number of births equals the number of deaths, you have reached the carrying capacity
__T__ 4. Biotic potential is affected by how often each individual reproduces
___F_ 5. A bell curve shows more prominent traits than average traits.
___F_ 6. A species with low biotic potential will ALWAYS have a low population size
_T___ 7. Wild fluctuations in population size is called chaos
__F__ 8. A parasite usually kills its host.
_F___ 9. Human intervention in natural community interactions usually makes the community more stable
___T_ 10. One of the effects of predation is the stabilization of the predator-prey relationship when there is not to much
predator pressure on the prey population
__F__ 11. In the study of a tidal pool, if the starfish, a keystone species, is removed, the other creatures flourish
Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
__B__ 12. Since Dragons have long lifetimes and few young, they are
a. R strategests
c. In the middle
b. K strategests
__D__ 13. An example of a population dependant tragedy, is a(n)
a. Tidal wave
c. Meteor
b. Onset of an ice-age
d. Predation
__D__ 14. The sequence of decreased death rate followed by a decrease in birthrate is called
a. environmental resistance
d. demographic transition
b. a limiting factor
e. replacement reproduction
c. doubling time coefficient
_C___ 15. All of the conditions under which an organism could conceivably survive and reproduce constitute its
a. habitat
c. fundamental niche
b. realized niche
d. resource partition
___C_ 16. Which of the following are not subject to inter-species competition
a. food
d. sunlight
b. water
e. space
c. mates
__A__ 17. A harmless fly resembling a sting wasp is an example of
c. mutual camouflage
a. batesian mimicry
b. mullerian mimicry
d. Commensalism
2
Camas B Invitational
Ecology
12/11/2010
__E__ 18. A keystone species is
a. an organism that acts commensally in a
d. a prey species that must be present or the
host
predator species will die off
b. a predator that destroys may different
e. a species whose removal causes major
species in a community
shifts in other species in a community
c. a mimic that has the same appearance as a
another, poisonous species
__C__ 19. Decomposition is
a. the process by which energy moves
through a food web
b. the process by which water enters an
ecosystem
c. the process by which nutrients are
recycled
d. the process by which plants convert
sunlight to energy.
___B_ 20. The percentage of energy available from one trophic level to the next is
a. 1%
c. 50%
d. 90%
b. 10%
__B__ 21. A lake in the winter experiencing a loss of plankton and algae could explain
a. inverted pyramid of numbers
c. inverted pyramid of energy
b. inverted pyramid of biomass
__A__ 22. Which is not a density dependant limiting factor?
c. parasitism
a. temperature
b. competition
d. Predation
__B__ 23. Which layer is defined by the upper and lower limits where life is possible?
a. atmosphere
d. hydrosphere
e. the earth's core
b. biosphere
c. lithosphere
__C__ 24. Most natural food chains are only four or five links long. the number of trophic levels is limited because
a. there are moe predators than herbivores
c. the efficiency in utilizing the food eaten
at each level is very low
b. winter kills off most insects and stops the d. all of the above are correct
food chains
_A___ 25. Ocean currents
a. are generated by friction between winds c. are important in shipping but have little
effect on living environments
and oceans surfaces
b. always move clockwise in an ocean basin d. are driven by the earth’s core rotating
faster than the ocean water
3
Camas B Invitational
Ecology
12/11/2010
Matching
Match these possible answers with the questions, not all must be used. they can be used more than once.
a.
b.
c.
d.
__C__ 26.
_B___ 27.
_E___ 28.
_A___ 29.
_D___ 30.
__B__ 31.
Phosphorous
Nitrogen
Carbon
Sulfur
Water
Oxygen
Hydrogen
Arsenic
Photosynthesis is part of which cycle?
Assimilation is part of which cycle?
Transpiration is part of which cycle?
Metabolism is a key part of which cycle?
Which extra element is present in acid rain?
Ammoniafication is part of which cycle?
a. Tundra
b. Taiga
_C___ 32.
___A_ 33.
__B__ 34.
__A__ 35.
__D__ 36.
_B___ 37.
_C___ 38.
e.
f.
g.
h.
c. Both
d. Neither
Which has an average temperature below 0 degrees in winter
Which is Farther North?
Where are trees are present
Layer of Permafrost
Noted for higher rainfall
Which has a longer growing season?
In which do most animals hibernate of migrate?
4
Camas B Invitational
Ecology
Short Answer
39. (6 points) Describe population density, population distribution, and carrying capacity
2 point- individuals per unit area,
2 point- dispersal of individuals
2 point- number of individuals the ecosystem can support
40. (4 points) Describe the process of borrowing carrying capacity
2 point- for taking resources
2 point- for degrades environment
41. (6 points) Which is better commensalism of mutualism? describe them both
2 point- for mutualism
2 point- for one is not very affected, one benefits -commensalism
2 point -for both benefit- mutualism
42. (6 points) What is amensalism and give an example.
4 points for one is affected negatively, the other is unaffected
2 point for something that works if described
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12/11/2010