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Exam 2 Practice questions

Terms in this set (21)

Suppose you found that the nest success of bank swallows was lower than expected in a particularly good habitat in spite of there being a LOT of nests in the banks that you are studying. In which area of the tolerance graph would you predict that this situation falls?
a. limit of tolerance
b. Lower zone of stress
C. Optimal range
D. Upper zone of stress
D. Upper zone of stress
because good habitat but low success
Which of the following organisms would you expect to practice foregut fermentation?
a. The hoatzin: a folivorous bits
B. The beaver: a herbivore that engages
C. The fox: an omnivorous
D. The osprey: a piscivorous bird
E. Both A and B are likely to be foregut fermenters
A. The hoatzin: a folivorous bits
What type of mating system would you expect to find if females are completely capable of raising their young with no help from the males?
A. Lifetime Monogamy
B. Polyandry
C. Polygyny
D. Seasonal monogomay
E. any of these are likely
C. polygyny
You encounter an animal in which only males which hold territories get to reproduce. You later discover that this species is hermaphroditic, you should expect that they are probably...
A. Protandrous
B. Simultaneous hermaphrodites
C. Protogynous
D. Monomorphic
C. protogynous
You've discovered a new species of animal high in the mountains where conditions are variable, unpredictable, and frequently very difficult. Which of the following characteristics would you LEAST likely find in this species?
A. Semelparity
B. Large litter size
C. Determinate growth
D. Late age of maturation
E. none of the above
D. late age of maturation
Which of the following is not generally an allocation tradeoff?
A. lots of offspring : precocial offspring
B. Short life span : iteroparity
C. Continuous breeding : seasonal breeding
D. Large litter : parental care
E. Root growth : shoot growth
D. Large litter : parental care

This is not a trade-off → usually not any parental care if a large amount of litter
Usually either have lots of offspring or have fewer offspring with increased parental care
Squirrels collect corn kernels and plant them all over my back years so that in the summer I have corn stalks sprouting all over the place. What dispersion pattern is this likely to be?
A. Random dispersion
B. Uniform dispersion
C. Aggressive
D. Clustered dispersion
E. It is not possible to predict the dispersion
A. random dispersion
If you estimated the size of a population of otters using mark-recapture techniques, which of the following discoveries would you indicate that your estimate was likely too low?
A. You find that the otters quickly become trap-happy
B. You find that the marks you used are easily lost
C. You find that many of your marked animals move away
D. These otters are trap-happy
E. You find that your marks make the otters more susceptible to predation
D. These otters are trap-happy
because This makes the denominator higher = causing the estimate to be too low
Looking at turtles, you find that females will lay up to 100 eggs in the nest then leave. Most of these eggs and nestlings will be consumed by predators; however, those who survive to adulthood can look forward to decades of reproductive life ahead. Your pop has an R0 = 2.47. What can you safely conclude about this population?
A. This population is mostly likely growing in size
B. This population has a type 2 survivorship curve
C. This population is doomed since so few offspring reach adulthood
D. If the T of the population was increased, the population would grow faster
E. Both A & D are true
A. This population is mostly likely growing in size
In a life table for the gull, the survivorship value l4= 0.476. What does this mean?
A. This population is shrinking since the L is less than one
B. For a cohort of 924 individuals that were born, 440 will be alive at the start of age class x=4
C. The fecundity of the birds increases with age
D. All of the above
E. It is not possible to tell without more information than is provided in the description
B. For a cohort of 924 individuals that were born, 440 will be alive at the start of age class x=4
Phenotypic plasticity
A. Only affects external anatomical phenotype
B. is unrelated to genetic variation within a species
C. Is directly responsible for speciation in pupfish and Darwin's finches
D. is seen in the pupfish morphology, their behavior, and their physiology
E. Always results in an irreversible shift in phenotype
D. is seen in the pupfish morphology, their behavior, and their physiology
The pools and springs of Death Valley
A. are good habitats for small fish, being relatively stable, protected from predation and rich in nutrients
B. Are basically stable in size since they don't depend on regular rainstorms for replenishment
C. dry up for a period annually and have to be constantly repopulated by fish
D. are freshwater habitats resulting just from rain and runoff
E. are primarily artesian (groundwater-based)
E. are primarily artesian (groundwater-based)
This study primarily examined:
A. ultimate causes of phenotypic plasticity
B. descriptive answers to questions about different phenotypes of pupfish populations
C. proximate causes of phenotypic plasticity
D. the natural history of one population of pupfish
E. none of the above
C. proximate causes of phenotypic plasticity
Identify the mismatched pair:
A. goitrogens : interfere with thyroid function
B. morphological changes in refuge populations : phenotypic plasticity
C. paedomorphic : Devil's hole pupfish
D. territorial behavior : AVT hormone
E. pupfish : 5-6" long as adults
E. pupfish : 5-6" long as adults
Which of the following conditions caused a shift to a morphology more like the Devil's Hole species (smaller with a larger head, no pelvic fins...)?
A. food restriction
B. cooler water temperatures
C. increased salinity
D. increased thyroid hormone levels
E. all of the above factors caused this shift
A. food restriction
The study obtained its data from:
A. by monthly surveys of the bird population size
B. from annual bird count held around christmas time
C. from reports of diseased birds at specific locations
D. by trapping birds and recording what proportion were diseased
E. both B & C
E. both B & C
-annual bird count at Xmas time
-reported diseased birds at locations
Identify the mismatched pair:
A. threshold prevalence : greater than or equal to 20%
B. house finches : introduced to the eastern US
C. highest finch populations : first to be affected by the disease
D. conjunctivitis : introduced to control growing finch populations
E. none of these are mismatched
D. conjunctivitis : introduced to control growing finch populations
Which of the following statements is true according to the paper?
A. the only explanation for the associated declines in finch abundance is density dependence
B. all populations of affected finch declined in abundance following infection
C. theory predicts that disease should always result in stable density-dependent regulation of host populations
D. it appears that this disease has comparatively low rate of transmission in the wild
E. none of these are correct
D. it appears that this disease has comparatively low rate of transmission in the wild
An epizootic is
A. an external parasite of an animal species
B. An epidemic disease in a population of an animal species
C. a disease that can be transmitted from animals to humans
D. any small disease-causing animal, like a mosquito
E. none of the above
B. An epidemic disease in a population of an animal species
The disease in the paper:
A. is only known to affect house finches and domestic poultry
B. is caused by a bacterium
C. originated on both coasts of the US simultaneously and has moved toward the middle
D. appears to have different effects in different population of finches
E. all of the above
E. all of the above
When one party of the body grows at a different rate than another one does, for example our head vs our body growth, this is known as _____________________ growth.
Allometry
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