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WorksheetsUnit 11 Ecology and Human Impact
Total questions: 56
Worksheet time: 4hrs 31mins
In an aquatic ecosystem, a species of fish thrives in the clear waters of a large lake. Which of the following is an example of a density-independent limiting factor that could reduce the population of this fish species?
A viral infection spreads rapidly through schools of closely packed fish.
Overfishing occurs as fishermen target densely populated spawning grounds.
Pollution from a nearby factory spill decreases the water quality, leading to a die-off of fish.
Competition for food increases as the fish population grows, leading to slower growth rates and smaller fish.
In a freshwater lake, certain species of fish feed on the algae growing on the surface, keeping the algae from overpopulating and blocking sunlight. The reduction in algae allows sunlight to penetrate the water, supporting other aquatic plants that provide oxygen and habitat for the fish. Which term best describes this plant-fish interaction?
Mutualism
Commensalism
Parasitism
Predation
Several species of hummingbirds are found in the same rainforest region. They minimize competition by feeding on different types of flowers, which are found at varying heights and locations. Some prefer the canopy's blossoms, while others feed on shrubs or ground-level plants. In this way, they can coexist peacefully in the same area because they:
exhibit different colors and sizes.
do not drink nectar from the flowers.
occupy different niches within the rainforest.
experience different humidity levels in the rainforest.
"Considering the diet and predators of honeybees, which of the following best defines their ecological niche?"
Their ability to fly at high speeds to escape predators
Their role in pollinating plants while feeding on nectar and being prey to birds and insects
Their tendency to form hives in protected areas
Their migration patterns in response to seasonal changes
A pond ecosystem contains several species of frogs. What allows these different species to coexist in the same pond?"
They all sing different mating calls.
They occupy different areas of the pond and eat different types of food.
They are all different colors.
They all breed at different times of the year.
In a coral reef ecosystem, various species of fish thrive without directly competing with one another. Which of the following best explains this phenomenon?"
All fish species in the reef migrate at different times of the year.
Each fish species prefers a different depth and type of coral for shelter and hunting.
The fish in the reef communicate with each other to establish feeding times.
Different fish species in the reef are active at different times of day and night.
Asian carp were introduced into U.S. waterways for aquaculture and wastewater treatment. What factor has contributed most to the rapid increase of Asian carp in these ecosystems?
The carp have adapted to feed on a new type of plant found only in U.S. waterways.
The carp have developed a resistance to diseases that are common in U.S. waterways.
There are few natural predators in U.S. waterways to control the carp population.
The water temperature in U.S. waterways is ideal for carp breeding year-round.
This is primarily due to changes in which lake condition?
Predator population lags behind prey population because:
Increase in predators leads to decrease in prey
Increase in predators leads to increase in prey
Increase in predators leads to decrease in producers
The chart shows predator and prey relationships in four different ecosystems.. Which is a correct example of a change that would happen to one population because of a change in the other population because of a predator/prey relationship?
When the population of sharks decreases because of fishing, the population of small fish will decrease.
When the population of dragonflies decreases because of humans, the population of mosquitos will decrease.
During hunting season when many deer are killed by hunters, the mountain lion population will decline.
When the mice population increases due to having more resources, the population of snakes will decrease.
In an ecosystem, the presence of many different species is critical for the survival of some forms of life when
Ecosystems remain stable over periods of time
Significant changes occur in the ecosystem
Natural selection does not occur
The finite resources of Earth increase
Decomposers are important in the environment because they
Convert large modules into simpler molecules that can be recycled
Release heat from large molecules so that the heat can be recycled through the ecosystem
Can take I carbon dioxide and convert it into oxygen
Convert molecules of dead organisms into permanent biotic parts of an ecosystem
In some areas, foresters plant one tree for every tree they cut This activity is an example of
Lack of management of non renewable natural resources
A good conservation practice for renewable natural resources
A good conservation practice for non renewable natural resources
Lack of concern for renewable natural resources
An environment can support only as many organisms as the available energy, minerals and oxygen will allow. Which term is best described by this statement
Biological feedback
Carrying capacity
Homeostatic diversity
Biological diversity
In a forest community, a shelf fungus and a slug live on the side of a decaying tree trunk. The fungus digests an absorbs materials from the tree, while the sung eats algae growing on the outside of the trunk. These organisms do not compete with one another because they occupy
The same habitat, but different niches
The same niche, but different habitats
The same niche and the same habitat
Different habitats and different niches
In an ecosystem, nutrients would be recycled if they were transferred directly from herbivore to carnivores to
Hosts
Prey
Decomposers
Autotrophs
Imported animals species often disrupt an ecosystem because in their new environment, they will most likely
Eliminate the fetid variation of autotrophs
Increase the number of mutations in the herbivores
Have no natural enemies
Be unable to produce offspring
What is an invasive species?
An organism that is new to an environment that has positive effects on the environment.
An organism that is native to an environment that has negative effects on the environment.
An organism that is new to an environment that has negative effects on the environment.
An organism that is native to an environment that has positive effects on the environment.
Which of these are fossil fuels? Select all fossil fuels listed.
steam
coal
gas
oil
The main human activity that releases greenhouse gases is
using public transportation and there by reduce the affects of greenhouse gases.
burning fossil fuels
texting on cellphones
eating meat
Burning fossil fuels (like coal) to generate electricity releases sulfur dioxide and nitrogen oxides which react with gases in the atmosphere. This leads to precipitation called:
ozone
acid rain
greenhouse gases
methane
All of the following are causes for biodiversity loss, EXCEPT:
Habitat Loss
Invasive Species
Replanting trees
Pollution
High biodiversity makes it more likely that the ecosystem will be able to keep functioning after a disturbance, such as disease or natural disaster.
True
False
According to the graph, what is causing the deer population to decrease
They got sick
The wolf population is decreasing
The wolf population increased
They ran out of food
What is the term for the number of different plants and animal found within an area? The more varied an ecosystem is, the more stable the ecosystem.
Biodiversity
Homeostasis
Biotic
Biosphere
All of the living populations that are found and interact within an ecosystem.
Population
Species
Community
Ecosystem
An organism that feeds exclusively on plant material, example – a deer.
Carnivore
Herbivore
Omnivore
Producer
Those resources that are unable to be replaced and, once used up,are gone. Fossil fuels are examples of this type of resource.
Renewable Resources
Non Renewable Resources
Sun Energy
Biotic
The interactions of living organisms and non-living factors within an area.
Ecosystem
Population
Biosphere
Climax Community
What type of growth is demonstrated in the graph?
Exponential
Carrying capacity
Linear
Negative
Which of the following demonstrates population growth when there is limited available water in an area?
When Yellowstone National Park was created in the late 1800s, wolves were on the decline. The last wolves in Yellowstone were killed in 1926, but in the 1800s, there were between 100-160 wolves in the park. In 1995, gray wolves were reintroduced to the park.
Which graph (drawn in red) below shows a prediction of how the population would change if there was less water available in the ecosystem?
There would be no change to carrying capacity.
What happens to the other 90% of energy when it is passed up the food chain?
it is found in the dirt
it is used for metabolic processes or given off to the environment as heat
it us used for swimming
it is used to make a Krabby Patty
