BIOLOGY 100 CHAPTERS 18-20 EXAM
QUESTIONS WITH CORRECT ANSWERS
Ecology is the study of what? [definition] - Answers -How organisms interact with their
environment
Which of the following is abiotic? [recognize abiotic factors] - Answers -Abiotic- physical
and nonliving chemical characteristics, such as temperature, soil moisture, or CO2
availability
Biotic- any characteristics relating the environment to living organisms, such as
population density or bacterial load
What level of ecology is concerned with groups of individuals of the same species?
[recognize the different levels of
ecology] - Answers -Population Ecology
What level of ecology is concerned with groups of individuals of different species?
[recognize the different levels of
ecology] - Answers –Community
Certain species of acacia trees in Central and South America have hollow thorns that
house stinging ants, which
attack anything that touches the tree. The ants feed on nutrients produced by the
acacias. This is an example of...
[know about the different ways organisms interact] - Answers -Mutualistic
In the food chain grass -> antelope -> human -> lion, the antelope is - Answers -Primary
consumer and herbivore
Bears eat berries, humans, and large fish; large fish eat smaller fish and insects;
humans eat bears, large fish, and
berries; venus fly traps eat insects. The scenario described here is an example of -
Answers -A food web
What level of ecology is concerned with both the biotic and abiotic aspects of an
environment? [recognize the
different levels of ecology] - Answers -Ecosystem
, If one were to propose an overarching level of ecology concerned with Planet Earth in
its entirety, what could one
call it? [recognize the different levels of ecology] - Answers -Biosphere
What is the primary source of energy for nearly all of the Earth's ecosystems? [one-
word answer] - Answers -Sunlight
In the absence of solar energy, what is an example of how some organisms manage
their energy requirements? - Answers -Hydro thermal vents provide chemotrophic
bacteria
Wind may affect which of the following? [understand what wind does in an environment]
- Answers -Effects the environment and growth patterns
Plants depend on wind to disperse pollen and seeds
Some require wind to blow in nutrients
Which of these is ordinarily NOT considered a catastrophic disturbance? [recognize
catastrophic disturbances] - Answers -Catastrophic disturbance- earthquakes, volcanic,
fire, hurricanes, tornadoes, floods.
Would be a small occurrence
Which of these might best be considered a periodic disturbance? [recognize periodic
disturbances] - Answers -Hurricanes, tornadoes, and floods
Even though water is essential to life on Earth, it provides organisms with a set of
challenges. Which of the
following organisms might have a problem with water? [understand the importance of
water and associated
problems] - Answers -Organisms have to be able to deal with all forms of water (solid,
liquid, gas)
Freshwater organisms are in danger of picking up too much water and lysing their cells
Marine organisms have to balance their cells against the high salt concentration
Lack of water
The number of individuals of a population per unit area is the... [definition] - Answers -
Density
What name is given to the dispersion model, in which no pattern is evident? [definition] -
Answers -Random
QUESTIONS WITH CORRECT ANSWERS
Ecology is the study of what? [definition] - Answers -How organisms interact with their
environment
Which of the following is abiotic? [recognize abiotic factors] - Answers -Abiotic- physical
and nonliving chemical characteristics, such as temperature, soil moisture, or CO2
availability
Biotic- any characteristics relating the environment to living organisms, such as
population density or bacterial load
What level of ecology is concerned with groups of individuals of the same species?
[recognize the different levels of
ecology] - Answers -Population Ecology
What level of ecology is concerned with groups of individuals of different species?
[recognize the different levels of
ecology] - Answers –Community
Certain species of acacia trees in Central and South America have hollow thorns that
house stinging ants, which
attack anything that touches the tree. The ants feed on nutrients produced by the
acacias. This is an example of...
[know about the different ways organisms interact] - Answers -Mutualistic
In the food chain grass -> antelope -> human -> lion, the antelope is - Answers -Primary
consumer and herbivore
Bears eat berries, humans, and large fish; large fish eat smaller fish and insects;
humans eat bears, large fish, and
berries; venus fly traps eat insects. The scenario described here is an example of -
Answers -A food web
What level of ecology is concerned with both the biotic and abiotic aspects of an
environment? [recognize the
different levels of ecology] - Answers -Ecosystem
, If one were to propose an overarching level of ecology concerned with Planet Earth in
its entirety, what could one
call it? [recognize the different levels of ecology] - Answers -Biosphere
What is the primary source of energy for nearly all of the Earth's ecosystems? [one-
word answer] - Answers -Sunlight
In the absence of solar energy, what is an example of how some organisms manage
their energy requirements? - Answers -Hydro thermal vents provide chemotrophic
bacteria
Wind may affect which of the following? [understand what wind does in an environment]
- Answers -Effects the environment and growth patterns
Plants depend on wind to disperse pollen and seeds
Some require wind to blow in nutrients
Which of these is ordinarily NOT considered a catastrophic disturbance? [recognize
catastrophic disturbances] - Answers -Catastrophic disturbance- earthquakes, volcanic,
fire, hurricanes, tornadoes, floods.
Would be a small occurrence
Which of these might best be considered a periodic disturbance? [recognize periodic
disturbances] - Answers -Hurricanes, tornadoes, and floods
Even though water is essential to life on Earth, it provides organisms with a set of
challenges. Which of the
following organisms might have a problem with water? [understand the importance of
water and associated
problems] - Answers -Organisms have to be able to deal with all forms of water (solid,
liquid, gas)
Freshwater organisms are in danger of picking up too much water and lysing their cells
Marine organisms have to balance their cells against the high salt concentration
Lack of water
The number of individuals of a population per unit area is the... [definition] - Answers -
Density
What name is given to the dispersion model, in which no pattern is evident? [definition] -
Answers -Random
