Vocabulary
The study of the interactions between organisms and their interrelationships with the physical environment is known as
Ecology
Which group contains terms that are all directly associated with one of the organisms shown in the diagram below?
carnivore, predator, heterotroph, multicellular
The study of the interactions between organisms and their interrelationships with the physical environment is known as
ecology
The graph below shows the changes in the size of a fish population over a period of time.
The dashed line on the graph represents the
carrying capacity of the environment
A decrease in the biodiversity of an ecosystem usually leads to
A decrease in stability
Which level of biological organization includes the greatest total number of species?
Biosphere
Rabbit populations vary in size over time. An increase in which factor would likely prevent the rabbit population from steadily increasing?
Predators
Which level of biological organization includes the greatest total number of species?
biosphere
A scientist was studying a population of fish in a pond over a period of 10 years. He observed that the population increased each year for 3 years, and then remained nearly constant for the rest of the study. The best explanation for this observation is that the population had
reached carrying capacity
Which consequence could most likely be associated with a decrease in biodiversity in an area?
Some sources of future foods or medications would be lost.
A group of organisms within a given area capable of interbreeding and producing fertile offspring under natural conditions is called
A population
Which statement best describes a characteristic of an ecosystem?
It must have organisms that carry out autotrophic nutrition.
Organize the relationship of these ecological terms from smallest to largest.
Population -> Ecosystem -> Biosphere
Which statement best describes the trend shown in this graph?
In a stable ecosystem, the number of individuals in a population is usually maintained within a certain range.
Based on this information, which ecosystem is likely to be the most stable?
C
Which ecological term refers to all the organisms shown in the diagram?
A community
Sharks are often followed by smaller fish that eat some of the scraps from the organisms eaten by the shark. These smaller fish are acting as
scavengers
An example of a population is
all the Zapus hudsonicus in New York State
When the carrying capacity for a species in a habitat is reached, the population of the species levels off. This slowing of the rate of growth is most likely due to
limited resources
One advantage of biodiversity in an ecosystem is that it
increases the chance that some organisms will survive a major change in the environment
Members of a bird-watching club observed the activities of three species of birds for an entire spring and summer. They noticed that the different species fed at different heights in the same pine tree. Which ecological concept is supported by this observation?
Organisms that live in the same ecosystem can occupy different niches in the ecosystem.
An earthworm lives and reproduces in the soil. It aerates the soil and adds organic material to it. The earthworm is a source of food for other organisms. All of these statements together best describe
an ecological niche
During which time period was the meadow mouse population most stable?
1980–1983
Carnivorous plants, such as pitcher plants and sundews, live in bogs where many other organisms cannot. Due to the high rate of decomposition occurring in bogs, the environment is acidic and contains very little oxygen and nutrients. The bogs only support certain types of organisms because
the growth and survival of organisms depends upon specific physical conditions
Which statement is a valid inference based on information in the chart?
There are conditions in Costa Rica that account for greater biodiversity there.