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ecology quiz study guide
Terms in this set (45)
The branch of biology dealing with interactions among organisms and between organisms and their environment is called
All of the members of a particular species that live in one area are called a(an)
Which of the following descriptions about the organization of an ecosystem is correct?
Species make up populations, which make up communities
What is the original source of almost all the energy in most ecosystems?
The algae at the beginning of the food chain in Figure 3-1 are
An organism that uses energy to produce its own food supply from inorganic compounds is called a(an)
Which of the following organisms does NOT require sunlight to live?
An organism that cannot make its own food is called a(an)
Organisms that obtain nutrients by breaking down dead and decaying plants and animals are called
What is an organism that feeds only on plants called?
What is an ecological model of the relationships that form a network of complex interactions among organisms in a community from producers to decomposers?
What animals eat both producers and consumers?
Only 10 percent of the energy stored in an organism can be passed on to the next trophic level. Of the remaining energy, some is used for the organism's life processes, and the rest is
eliminated as heat
The repeated movement of water between Earth's surface and the atmosphere is called
the water cycle
Which of the following is NOT recycled in the biosphere?
Carbon cycles through the biosphere in all of the following processes EXCEPT
Organisms need nutrients in order to
carry out essential life functions
The movements of energy and nutrients through living systems are different because
energy flows in one direction and nutrients recycle
The average year-after-year conditions of temperature and precipitation in a particular region is the region's
All of the following factors contribute to Earth's climate EXCEPT
biome's and ecosystems
The greenhouse effect is
a natural phenomenon that maintains Earth's temperature range.
Each of the following is an abiotic factor in the environment EXCEPT
Which is a biotic factor that affects the size of a population in a specific ecosystem?
number and kinds of predators in the ecosystem
During a long period when there is no rainfall, a mountain lion may temporarily leave its usual hunting territory to drink from a farm pond. This behavior is probably due to
the change in an abiotic factor in its environment
An organism's niche is
the way the organism uses the range of physical and biological conditions in which it lives
Several species of warblers can live in the same spruce tree ONLY because they
occupy different niches within the tree
An interaction in which one organism captures and feeds on another organism is called
No two species can occupy the same niche in the same habitat at the same time
because of the competitive exclusion principle
A symbiosis in which both species benefit is
The symbiotic relationship between a flower and the insect that feeds on its nectar is an example of
mutualism because the flower provides the insect with food, and the insect pollinates the flower
The series of predictable changes that occurs in a community over time is called
What is one difference between primary and secondary succession?
Secondary succession begins on soil and primary succession begins on newly exposed surfaces.
Which two biomes have the least amount of precipitation?
tundra and desert
A biome is identified by its particular set of abiotic factors and its
characteristic ecological community
One of the main characteristics of a population is its
Which are two ways a population can decrease in size?
decreased birthrate and emigration
When individuals in a population reproduce at a constant rate, it is called
As resources in a population become less available, population growth
reaches carrying capacity
In a logistic growth curve, exponential growth is the phase in which the population
grows quickly and few animals are dying
A biotic or an abiotic resource in the environment that causes population size to decrease is a
All of the following are limiting factors EXCEPT
If a population grows larger than the carrying capacity of the environment, the
death rate may rise
Each of the following is a density-dependent limiting factor EXCEPT
Which of the following is a density-independent limiting factor?
A disease resulting in the deaths of one-third of a dense population of bats in a cave would be a
density-dependent limiting factor
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