BIO1108 FARMER UNIT 3 EXAM
QUESTIONS AND ANSWERS
GRADED A+
What is an energy budget? - Answer- An energy budget refers to the balance between
energy input from the Sun, heat loss through radiation, photosynthesis, and the
metabolism of living organisms.
What is the significance of fossil fuels in the energy budget? - Answer- Fossil fuels
represent a significant portion of the energy budget, but they are finite resources.
How has human population growth been linked to fossil fuels? - Answer- The availability
of abundant energy from fossil fuels has contributed to population growth and the
development of an industrial society.
What has happened to a significant portion of the available biomass energy? - Answer-
Humanity has already depleted a significant portion of the available biomass energy.
What led to a rapid acceleration in energy consumption? - Answer- The industrial
revolution led to a rapid acceleration in energy consumption.
What do current trends suggest about the remaining energy resources? - Answer-
Current trends suggest that the remaining energy resources will be used up relatively
quickly.
What is needed to address the energy crisis? - Answer- Alternative energy sources and
solutions to reduce energy consumption are needed.
Is focusing on energy efficiency enough to change the trajectory? - Answer- Simply
focusing on energy efficiency may not be enough to change the trajectory.
What is population control? - Answer- Reducing human population through gradual and
humane methods.
Why is population control important? - Answer- To address the energy crisis and
minimize environmental impact.
What are individual actions? - Answer- Actions individuals can take to reduce their
carbon footprint.
,How can individuals contribute to reducing their carbon footprint? - Answer- Through
education and government policies for effective individual actions.
What is one individual action to reduce energy consumption? - Answer- Changing
lighting to energy-efficient options like LEDs.
How can laundry habits contribute to lowering energy usage? - Answer- Washing
clothes in cold water and air-drying them.
What is one way to reduce carbon emissions from transportation? - Answer- Replacing
gasoline-powered cars with hybrid or electric vehicles.
How can adopting a plant-based diet help lower one's carbon footprint? - Answer- It
reduces the energy required for food production.
What is one way to contribute to a reduction in carbon emissions? - Answer- Opting for
green energy sources like solar or wind power.
How can cutting down on air travel help lower one's carbon footprint? - Answer- Air
travel is associated with high carbon emissions.
What are two ways to reduce carbon emissions from transportation? - Answer- Using
public transportation and choosing walkable areas.
How can having fewer children impact an individual's carbon footprint? - Answer- It
leads to a lower cumulative carbon footprint for future generations.
What is one individual action recommended for climate mitigation? - Answer- Switching
to energy-efficient light bulbs.
What is one way to lower energy usage in laundry? - Answer- Washing clothes in cold
water and air-drying them.
What type of vehicles can significantly reduce carbon emissions? - Answer- Hybrid or
electric cars.
What is one way to reduce the energy required for food production? - Answer- Adopting
a plant-based diet.
What are two examples of green energy sources? - Answer- Solar and wind power.
How can reducing air travel contribute to lowering carbon emissions? - Answer- Air
travel is a major source of carbon emissions.
How can having fewer children impact future carbon footprints? - Answer- It leads to a
lower cumulative carbon footprint for future generations.
,What are the biological aspects that allow the people of Tibet to survive at high
altitudes? - Answer- Physiological adaptations to low oxygen levels.
What is the Wild Rumpus Festival? - Answer- An annual fun event in Athens.
What factors affect metabolic rates in organisms? - Answer- Environmental conditions
and thermoregulation strategies.
How can metabolic rates be measured? - Answer- By measuring oxygen consumption.
What is the difference between endotherms and ectotherms? - Answer- Endotherms
use more energy to maintain internal temperature.
How does an animal's size relate to its metabolic rate? - Answer- Larger animals tend to
have a more efficient energy use.
Why do herbivores have higher body temperatures than carnivores? - Answer-
Fermentation in their guts raises their body temperature.
Why do sea otters need to consume a large proportion of their body weight daily? -
Answer- Due to their high metabolic rates.
What do animals consider when developing foraging strategies? - Answer- Caloric value
of food items and time to find them.
What caused the population decline of sea otters? - Answer- Historical hunting
What did the otters' diet shift to after their population rebounded? - Answer- More crabs
and fewer clams and abalones
How did the change in otters' diet impact the ecosystem? - Answer- Not specified
What do sea otters prefer in their food? - Answer- High caloric value
What factor affects the energy expenditure of sea otters when obtaining food? - Answer-
Time and effort required
What do sea otters use as tools to open hard-shelled prey? - Answer- Rocks
What are predator-prey relationships? - Answer- Interactions between predators and
their prey in an ecosystem.
How do predators like sea otters influence their prey populations? - Answer- They
control the populations of their prey, such as sea urchins and crabs.
, What happens when otter populations are high? - Answer- They control sea urchin
populations, allowing kelp forests to flourish.
What are trophic cascades? - Answer- Changes in top predator abundance causing
impacts on lower trophic levels.
What is the role of sea otters in trophic cascades? - Answer- Their presence or absence
has a profound ripple effect on the entire food web.
What is bottom-up control? - Answer- Primary producers limiting the abundance of
higher trophic levels.
What is top-down control? - Answer- Top predators regulating the entire food web.
Do bottom-up and top-down control both play a role in shaping ecosystems? - Answer-
Yes, both factors are important in ecosystem dynamics.
What are keystone predators? - Answer- Predators that have a disproportionate
influence on ecosystem structure and diversity.
Why are sea otters considered keystone predators? - Answer- They can transform an
ecosystem from an urchin barren to a flourishing kelp forest.
What is food web complexity? - Answer- The presence of diverse species interactions in
a healthy ecosystem.
What do kelp forests support? - Answer- High biodiversity and critical habitat for various
species.
What is the preferred habitat for many species? - Answer- Kelp forests.
What are some prey species mentioned in the passage? - Answer- Sea urchins and
crabs.
What is the significance of keystone species? - Answer- They play a crucial role in
maintaining ecosystem health.
What is the ongoing ecological debate mentioned in the passage? - Answer- The
debate between bottom-up and top-down control of ecosystems.
What is the impact of sea otters on sea urchin populations? - Answer- They control sea
urchin populations when their own populations are high.
What is the impact of sea otters on kelp forests? - Answer- Their presence allows kelp
forests to flourish.
QUESTIONS AND ANSWERS
GRADED A+
What is an energy budget? - Answer- An energy budget refers to the balance between
energy input from the Sun, heat loss through radiation, photosynthesis, and the
metabolism of living organisms.
What is the significance of fossil fuels in the energy budget? - Answer- Fossil fuels
represent a significant portion of the energy budget, but they are finite resources.
How has human population growth been linked to fossil fuels? - Answer- The availability
of abundant energy from fossil fuels has contributed to population growth and the
development of an industrial society.
What has happened to a significant portion of the available biomass energy? - Answer-
Humanity has already depleted a significant portion of the available biomass energy.
What led to a rapid acceleration in energy consumption? - Answer- The industrial
revolution led to a rapid acceleration in energy consumption.
What do current trends suggest about the remaining energy resources? - Answer-
Current trends suggest that the remaining energy resources will be used up relatively
quickly.
What is needed to address the energy crisis? - Answer- Alternative energy sources and
solutions to reduce energy consumption are needed.
Is focusing on energy efficiency enough to change the trajectory? - Answer- Simply
focusing on energy efficiency may not be enough to change the trajectory.
What is population control? - Answer- Reducing human population through gradual and
humane methods.
Why is population control important? - Answer- To address the energy crisis and
minimize environmental impact.
What are individual actions? - Answer- Actions individuals can take to reduce their
carbon footprint.
,How can individuals contribute to reducing their carbon footprint? - Answer- Through
education and government policies for effective individual actions.
What is one individual action to reduce energy consumption? - Answer- Changing
lighting to energy-efficient options like LEDs.
How can laundry habits contribute to lowering energy usage? - Answer- Washing
clothes in cold water and air-drying them.
What is one way to reduce carbon emissions from transportation? - Answer- Replacing
gasoline-powered cars with hybrid or electric vehicles.
How can adopting a plant-based diet help lower one's carbon footprint? - Answer- It
reduces the energy required for food production.
What is one way to contribute to a reduction in carbon emissions? - Answer- Opting for
green energy sources like solar or wind power.
How can cutting down on air travel help lower one's carbon footprint? - Answer- Air
travel is associated with high carbon emissions.
What are two ways to reduce carbon emissions from transportation? - Answer- Using
public transportation and choosing walkable areas.
How can having fewer children impact an individual's carbon footprint? - Answer- It
leads to a lower cumulative carbon footprint for future generations.
What is one individual action recommended for climate mitigation? - Answer- Switching
to energy-efficient light bulbs.
What is one way to lower energy usage in laundry? - Answer- Washing clothes in cold
water and air-drying them.
What type of vehicles can significantly reduce carbon emissions? - Answer- Hybrid or
electric cars.
What is one way to reduce the energy required for food production? - Answer- Adopting
a plant-based diet.
What are two examples of green energy sources? - Answer- Solar and wind power.
How can reducing air travel contribute to lowering carbon emissions? - Answer- Air
travel is a major source of carbon emissions.
How can having fewer children impact future carbon footprints? - Answer- It leads to a
lower cumulative carbon footprint for future generations.
,What are the biological aspects that allow the people of Tibet to survive at high
altitudes? - Answer- Physiological adaptations to low oxygen levels.
What is the Wild Rumpus Festival? - Answer- An annual fun event in Athens.
What factors affect metabolic rates in organisms? - Answer- Environmental conditions
and thermoregulation strategies.
How can metabolic rates be measured? - Answer- By measuring oxygen consumption.
What is the difference between endotherms and ectotherms? - Answer- Endotherms
use more energy to maintain internal temperature.
How does an animal's size relate to its metabolic rate? - Answer- Larger animals tend to
have a more efficient energy use.
Why do herbivores have higher body temperatures than carnivores? - Answer-
Fermentation in their guts raises their body temperature.
Why do sea otters need to consume a large proportion of their body weight daily? -
Answer- Due to their high metabolic rates.
What do animals consider when developing foraging strategies? - Answer- Caloric value
of food items and time to find them.
What caused the population decline of sea otters? - Answer- Historical hunting
What did the otters' diet shift to after their population rebounded? - Answer- More crabs
and fewer clams and abalones
How did the change in otters' diet impact the ecosystem? - Answer- Not specified
What do sea otters prefer in their food? - Answer- High caloric value
What factor affects the energy expenditure of sea otters when obtaining food? - Answer-
Time and effort required
What do sea otters use as tools to open hard-shelled prey? - Answer- Rocks
What are predator-prey relationships? - Answer- Interactions between predators and
their prey in an ecosystem.
How do predators like sea otters influence their prey populations? - Answer- They
control the populations of their prey, such as sea urchins and crabs.
, What happens when otter populations are high? - Answer- They control sea urchin
populations, allowing kelp forests to flourish.
What are trophic cascades? - Answer- Changes in top predator abundance causing
impacts on lower trophic levels.
What is the role of sea otters in trophic cascades? - Answer- Their presence or absence
has a profound ripple effect on the entire food web.
What is bottom-up control? - Answer- Primary producers limiting the abundance of
higher trophic levels.
What is top-down control? - Answer- Top predators regulating the entire food web.
Do bottom-up and top-down control both play a role in shaping ecosystems? - Answer-
Yes, both factors are important in ecosystem dynamics.
What are keystone predators? - Answer- Predators that have a disproportionate
influence on ecosystem structure and diversity.
Why are sea otters considered keystone predators? - Answer- They can transform an
ecosystem from an urchin barren to a flourishing kelp forest.
What is food web complexity? - Answer- The presence of diverse species interactions in
a healthy ecosystem.
What do kelp forests support? - Answer- High biodiversity and critical habitat for various
species.
What is the preferred habitat for many species? - Answer- Kelp forests.
What are some prey species mentioned in the passage? - Answer- Sea urchins and
crabs.
What is the significance of keystone species? - Answer- They play a crucial role in
maintaining ecosystem health.
What is the ongoing ecological debate mentioned in the passage? - Answer- The
debate between bottom-up and top-down control of ecosystems.
What is the impact of sea otters on sea urchin populations? - Answer- They control sea
urchin populations when their own populations are high.
What is the impact of sea otters on kelp forests? - Answer- Their presence allows kelp
forests to flourish.
