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WorksheetsUnit 1 Ecology
Total questions: 22
Worksheet time: 11mins
Food Availability, places to live, and water availability are all ______ of an ecosystem.
Biotic factors
Heterotrophic factors
Limiting Factors
Population Factors
The carrying capacity of a habitat constrains the populations of the organisms that live in it. Which of the following is NOT an abiotic factor that limits the carrying capacity of a habitat?
rate of soil erosion
amount of oxygen
availability of water
activity of decomposers
The single most important limiting factor in any terrestrial biome is
soil type
available water
seasonal changes
average annual temperature
Select all of the factors that may have prevented the solid line from continuing to increase.
increased predation
introduced disease
increased immigration
decreased resources
decreased emmigration
Which graph best indicates the effects of successful population control in humans?
When the members of a population reproduce at a constant rate and overshoot the carrying capacity of their environment, it is called _______________ growth.
logistic
demographic
exponential
density dependent
The graph shows changes in the population size of rabbits in an environment. Use the pictures to answer any questions that follow.
Select all of the factors that may have prevented the solid line from continuing to increase.
increased predation
introduced disease
increased immigration
decreased resources
decreased emmigration
The graph shows changes in population for the sea otter and sea urchin in the same stretch of water over a 24-year period.
Which of the following best describes the time period in which the sea otter population consumed the sea urchins faster than the sea urchins could reproduce?
before the year 1988
before the year 1994
after the year 1997
after the year 2003
Select two substances that a green plant must obtain from its environment to carry on photosynthesis.
glucose
carbon dioxide
chlorophyll
water
oxygen
From where does the energy originally come?
water
soil
oxygen
sunlight
Read the passage about the model of photosynthesis and respiration.
A student created a display board to model the process of photosynthesis and cellular respiration.
How are the molecules shown in the model used in the process of photosynthesis?
Glucose is taken in by the plant and water is released.
Carbon dioxide is taken in by the plant and oxygen is released.
Water and oxygen are used to produce glucose and carbon dioxide.
Oxygen and carbon dioxide are used to produce glucose and water.
Succession that occurs on abandoned agricultural fields is best described as
coevolution
primary succession
secondary succession
prairie succession
The diagram represents an ecological process.
Which statement is most likely referring to the process shown in the diagram?
Ecosystems tend to change with time until a stable system is formed.
Succession involves changes in plant species only.
Humans have modified the environment with technology and pollution.
Insect communities do not grow in aquatic habitats.
Yellowstone National Park is located on top of a large active volcano. Heat rising from the underground magma chamber of the volcano fuels unique ecosystems within the park's geysers, hot springs, and mud spots. If the volcano were to become inactive, the stability of ecosystems in the park's thermal features would
decrease
increase
decrease, then increase
increase, then decrease
What is the meaning of the word “pioneer” in the term “pioneer species?
A specie that has inhabited an area of land for a very long time and has flourished the area rapidly
The last specie to die out in an area of land that has gone under serious degradation
A specie that isn’t able take advantage of harsh physical conditions in environments where there is little competition
The specie that first colonized a disturbed area and alter the environment in ways that make it favorable to the colonization of other species
Which of the following may be caused by the construction of a dam?
destruction of a natural habitat
a decrease in evaporation
an increase in water flow
sustainable growth
The regrowth of a forest after a devastating fire is an example of what process?
primary succession
secondary succession
tertiary succession
intermediate succession
Which of following refers to the process that facilitates plant communities gradually changing over a period of time in order to respond to their environments?
development
succession
growth
disturbance
What is the only effective way to protect groundwater?
prevent contamination
use advanced sewage treatment
cover all wells carefully
treat all water from underground sources
Look at the picture above.
How are the people in this picture most likely changing their environment?
They are planting a tree to replace one that was cut down.
They are digging up a tree to use as firewood.
They are cutting down trees to clear a field.
They are planting weeds to take over a garden.
Some birds are known as honeyguides because humans often follow them to wild beehives. When the humans take the honey from the hives, the birds are able to feast on the honey and the bees as well. This type of relationship between the humans and the birds can best be described as
Mutualism
Commensalism
Parasitism
Herbivory
The picture above shows a change in the growth of roots over time in a tank full of soil.
What causes the roots to grow sideways?
The roots are growing toward the pull of gravity.
The roots are growing toward the water.
The roots are growing toward the light.
The roots are growing toward the air.
