Download Practice Test 4

Practice Test 4!
1. If a naturalist decided to implement a plan to minimize Human destruction of bluebird populations, this would
be part of
a. Basic ecology
b. Applied ecology
c. Dispersal
d. Species abundance
2. Which of these is not a level at which ecology can be studied?
a. Ecosystem
b. Organismal
c. Community
d. Abiotic
e. Population
3. The competetors, predators, pathogens, and other living organisms in an environment are called the
a. Biotic factors
b. Abiotic factors
c. Community factor
d. Distribution
4. What two factors are critical in dispersal?
a. Predator/prey interaction
b. Introduced/native species
c. Precipitation and temperature
d. Spatial and temporal factors
5. Humans introduced the zebra mussel into a lake twenty years ago - what is a typical problem with introduced
species such as the zebra mussel?
a. Introduced species can outcompete native species
b. Introduced species have a much higher rate of dispersal
c. Introduced species will die off quickly because the niche is inhabitable
d. Introduced species and native species will evolve into one species
6. If you’re standing in a certain biome and want to classify it, the most characteristic part of biomes that you
could use would be observing
a. The bodies of water in the region
b. The vegetation
c. The animals
d. The temperature
7. What would be characteristic of the coniferous forest biome?
a. Permafrost, many dwarf plants, cold and dry
b. Ample rainfall, much species diversity, hot
c. Water unavailable most of the year, short summers and long winters
8. A person standing at the equator and a person standing at 60 degrees N latitude would experience a large
difference in
a. Solar intensity
b. Altitude
c. Tilt of the earth
d. Velocity of wind
9. The tilt of the earth explains why
a. Ocean currents are extremely variable
b. The rain shadow effect occurs, causing rainy and dry areas on different sides of mountain ranges
c. The tropics have little change in seasonality while temperate regions have much change
d. The available moisture in the air changes from biome to biome
10. In the BIDE equation (Ni = No + B + I –D-E), what does No stand for?
a. The initial # of individuals
b. The final # of individuals
c. The imputs
d. A & B
11. If lambda is equal to 1.00, you would know that the population
a. Is growing
b. Is shrinking
c. Is staying the same
d. A or C
e. Not enough information to determine
12. Why is the rate of change small for a large population?
a. There are few individuals undergoing genetic change
b. There is a high level of gene flow
c. There are few individuals giving birth to keep the population going
d. There are few resources available to sustain large rate of change
13. A biologist wants to determine where the maximum growth is in a population, and knows the carrying capacity.
At what point (on the graph drawn on board) is there maximum growth in this population?
(see Dr.Serb’s notes)
14. on the Niche dimension drawn on board, which represents an opportunistic species, which is a generalist (jack
of all trades?), and which two are most competitive?
(See Dr. Serb’s notes)
15. Three birds have different sizes of beaks to fit into different areas of a niche gradient. What would happen if
two of the bird species became extinct?
a. The remaining one would shift beak size because of the removal of competition
b. Natural selection would maintain the same beak size for the bird
c. Two more species of birds would likely fill the niche gradient quickly
d. The increased competition would drive the remaining species to extinction as well
16. Competition between two species closely mirrors
a. The predation cycle
b. Intraspecific competition
c. Competition between 2 genotypes
d. Numerical responses
17. Which one of these is not part of the way two competitive species can coexist?
a. Each species must display some type of mimicry, either mullerian or batesian
b. Each species must inhibit growth more than competitor when abundant
c. Each species can grow when rare
d. Each species must be best at something
18. A flower is pollinated by many types of moths, and attracts them with pheromones. This type of mutualism is
a. Obligate
b. Intraspecific
c. Facultative
d. Indirect
19. Problem: If two obligate mutualists depend on each other, if one goes extinct or reduces in number, the other
species is also drastically affected. What is usually seen in nature instead of this?
a. Usually an obligate mutualist specializes on a facultative mutualist
b. Indirect effects can frequently balance out this problem
c. Mutualistic cycles will replenish the population after time, so there usually is no problem
d. A predation relationship may evolve between the two
20. What would limit a species carrying capacity when introducing a predator, even if resources remain the same?
a. The “ecology of fear”
b. The decrease in the amount of vegetation
c. Indirect effects
d. The dispersal abilities of the individuals