GY 101 Chapter 18 Exam Questions And Correct Answers
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Course
GY 101
Institution
GY 101
Desertification is defined as: - Correct Answer converting other lands to desert regions
A biome is: - Correct Answer a distinctive collection of organisms adapted to regional environmental conditions
Biomes are usually identified based upon _____, although sometimes geographic or climati...
Match each vertical layer of the rain forest to its proper description. - Correct Answer
Emergent: the tall trees of this layer have access to ample sunlight but must deal with
high temperatures
Canopy: this is the "roof" of the rain forest where most animal species live
Shrub and understory: plants in this shaded layer have broad leaves to capture sunlight
Forest floor: this is a dark, humid environment where organic matter decomposes
Which of the following nutrients limit productivity in aquatic systems? - Correct Answer
iron, phosphorus, nitrogen
Place the following terrestrial biomes in order of their productivity, placing the biome
with the highest productivity at the top and the lowest productivity at the bottom. -
Correct Answer Tropical rain forest
Temperate forest
Boreal forest
Grassland
Tundra
Identify each type of desert survival strategy used by plants (that does not directly
involve water) from its description. - Correct Answer Reproduction: desert plants
germinate and flower rapidly following periods of significant precipitation
Dispersal: plants contain seeds or segments that detach when animals brush up against
them
Allelopathy: plants release toxins into the surrounding soil that poison neighboring
plants
, ____ is a type of seasonal nomadism in which people move to optimal elevations to
experience the best temperatures and animal fodder at a particular time of year. -
Correct Answer transhumance
What is the tree line? - Correct Answer Trees do not grow above this transition on a
mountainside
A ____ is a type of plant that utilizes a deep taproot system to gain access to
groundwater. - Correct Answer phreatophyte
The nonliving components, such as climate and soil, that can influence terrestrial
biomes are known as _____ factors. - Correct Answer abiotic
In order to survive the harsh tundra environment, organisms can: - Correct Answer
migrate, hibernate, or develop layers of fat and fur
Xerophytic organisms are: - Correct Answer tolerant to arid environments
_____ and ______ are the two most important factors that affect the global distribution
of terrestrial biomes. - Correct Answer temperature; moisture
The scrub and woodland biome is found in: - Correct Answer most of India, coastal
southern California, parts of the Mediterranean basin
Rank the following regions in order of increasing amount insolation. - Correct Answer
1. polar
2. mid-latitude
3. subtropics
4. tropics
Despite its destructive nature, fire has numerous benefits to biomes, including: - Correct
Answer killing diseases and harmful insects; returning nutrients to the soil; allowing for
new successional cycles to begin
Match the type of grassland on the left with its proper description on the right. - Correct
Answer Savanna: this type occurs in the tropical regions
Prairie: tall grasses dominate outside tropical regions
Steppe: short grasses dominate outside of tropical regions
Wildfires can destroy wood and food resources and "bake" ____ particles, which can
lead to increased flooding and erosion of the ground surface. - Correct Answer soil
Which of the following is not a characteristic of the tundra biome? - Correct Answer
Trees restricted to riparian zones
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