Worksheet 30 Key - Iowa State University

Worksheet 30 – Review for Exam 5
Supplemental Instruction
Iowa State University
Leader: Kirsten Karkow
Course: Biol 211 - Wilsey
Date: 4/16/2012
Define the following terms:
Rain Shadow
Studies the interactions of organisms and their environment.
A major natural habitat (characteristic climate, flora, and fauna).
Transitional biome
Dry leeward side of a mountain
Indicate which of the following statements are true:
__F__ Climates are less variable inland.
__T__ Regions that get direct sunlight will be warmer than regions that get indirect sunlight.
__T__ Areas of tundra have too little moisture and sunlight to support tree growth.
__F__ Areas closer to the equator will have more dramatic winters and summers.
__T__ Equatorial areas have more consistent sunrise and sunset times.
__T__ Ocean currents can make coastal climates warmer or cooler than they would be.
Match the following biomes with their correct descriptions:
Tundra, Alpine Tundra, Chaparral, Tropical Grassland, Temperate Forest, Desert, Tropical
Forest, Coniferous Forest, Temperate Grassland
Extremely wet regions with very diverse wildlife. TROPICAL (RAIN) FOREST
Cold areas with wet and dry seasons. Evergreen shrubs are common. CHAPARRAL
Dry, cold regions with conical trees. CONIFEROUS FOREST
Moderate areas with four seasons. Bison and elk are common. TEMPERATE GRASSLAND
Extremely cold areas occurring near sea level. Only dwarf plants may grow. TUNDRA
Very hot and dry areas. Grasslands with sparse trees. TROPICAL GRASSLAND (SAVANNA)
Extremely arid regions with CAM plants. DESERT
Regions with moderate-abundant rainfall. Deer and turkey are common. TEMPERATE FOREST
Very dry and cold areas occurring at high altitude. ALPINE TUNDRA
Where do brackish biomes or estuaries occur? Freshwater-ocean transitions.
Where do abyssal biomes occur? At the deepest ocean depths.
What marine biome contains the most diverse wildlife? Coral reefs.
Answer the following multiple choice questions:
1. If you tag 100 cows, come back two weeks later, and find that 70 out of the 200 you
counted have tags, what is the approximate population size of that herd?
a. 140
b. 210
c. 285
d. 305
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2. The distribution occurring when the negative interactions and positive interactions
between members of the same species is…
a. Uniform distribution
b. Random distribution
c. Clumped distribution
3. Which of the following does not affect the reproductive rate of a population?
a. At what age reproduction begins
b. At what age reproduction ends
c. Frequency of reproduction
d. How many offspring are produced each time
e. Trick question, they all do
4. Which type of survivorship curve do humans display?
a. Type I
b. Type II
c. Type III
Define the following terms:
Discrete Generations
Overlapping Generations
Growth Rate
Net Reproductive Rate
Intrinsic Rate of Increase
Carrying Capacity
R-selected Species
K-selected Species
Exponential Population
Logistic Population
Statistical study of populations. Includes birth rates, death rates,
migration, sex ratios, and age structures.
Adults die before the next generation is born.
When individuals of many generations are alive at once.
R = B - D. Describes whether a population is growing (R > 0),
declining (R < 0), or at equilibrium (R = 0).
R0 = N2/N1. The average number of offspring an individual will
produce in his/her lifetime. The population is growing if R0 > 1.
Rmax. Growth rate under ideal conditions (no environmental limits).
K, the maximum population an environment can sustain.
Display rapid initial growth, but unable to sustain N around K.
Slower initial growth, but can sustain N around K.
J-shaped (unlimited, continually accelerating) growth. Occurs in
density-independent or very small populations. 𝛥𝑡 = 𝑟𝑁
S-shaped (limited) growth. Occurs in density-dependent
populations as N approaches K.
= 𝑟𝑁 (
Which of the following is not an important determinant of density-independent population
a. Depletion of resources
b. Natural disasters
c. Poor competition
d. Disease
e. All of the above
f. A and C
g. A, C and D