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WorksheetsDIA 7: Ecology
Total questions: 24
Worksheet time: 14mins
Fossil fuels provide most of the world's energy, but there are many negative environmental impacts. What is the best strategy to combat these issues?
educate people about the harmful impacts and gradually replace fossil fuels with alternative energy sources
fund research to discover new energy sources and use up the remaining fossil fuels
fine people and companies that overuse fossil fuels
create environmental policies that ban the use of all fossil fuels
Iguanas eat only plants. Turtles eat some plant leaves, but they also eat worms and small insects. Mushrooms break down dead organisms. Which of the following statements is true?
Iguanas are primary and secondary consumers
Iguanas are secondary consumers
Turtles are primary and secondary consumers
Grasses are decomposers
Use the image of this basic energy pyramid as a guide. Which of the following statements is true regarding this food pyramid?
There is less energy at the bottom of the pyramid (trees and scrubs) because the tissues are less dense
There is always more energy at the top of the energy pyramid
There is more energy available in the second trophic level because those organisms need less energy for their biological processes
There is less energy in the 4th trophic level (the snake) because of the energy loss due to heat and metabolism from the lower trophic levels
When one of Mr. Hobson's snakes eats a rat, nutrients from the rat become incorporated into the tissues of the snake. During this process, what percentage of energy is transferred when you move from one trophic level to the next?
90%
10%
40%
50%
The diagram provided shows the flow of energy in a particular ecosystem where the producer receives all of its energy from the Sun. Which of the following statements is true?
The leopard receives less energy than the producers.
The leopard and preying mantis receive the same amount of energy.
Heat energy from the leopard and the ladybug increases the available energy to the snake.
Most of the energy the preying mantis receives from the ladybug the snake receives from the preying mantis
A disease wipes out the population of white-tailed deer. Which of the following is most likely a consequence of this disease-causing event?
An increase in the American Bald Eagle population.
The population of lady ferns will decrease.
The population of black bears will decrease.
An increase in the squirrel population
The lionfish is a species of fish native to the Indo-Pacific region but they are an invasive species in the Atlantic. There are currently efforts to remove these species from waters off the coast of Florida and the Florida Keys. Which statement best explains why biologists are concerned about the lionfish?
They could upset the territorial boundaries of native organisms
The lionfish can resist diseases the native fish cannot
The lionfish could interbreed with native fish and spawn mutant hybrids
They consume native organisms and cause native populations to decline.
The eruption of Krakatoa from Rakata Island in Indonesia in 1883 destroyed 70% of the island, forced millions of metric tons of ash into the air, and could be felt as far away as the Mediterranean. It took months for the sky to clear of ash. Which is most likely the result of the Krakatoa eruption?
the cloud of ash blocked the sunlight, decreasing photosynthesis and slowing down the carbon cycle
volcanic ash replaced oxygen in the air, causing many animals to die
large forests were destroyed by the ash; speeding up the carbon cycle and increasing the amount of decomposition
Heat from the eruption evaporated the ocean water, speeding up the water cycle, and increasing precipitation of the region
Which of the following statements is true regarding the amount of water present in the Earth system in the last 1,000 years?
The amount of water is the same due to the Law of Conservation of Matter.
The amount of water has decreased due to the amount of human consumption.
The amount of water has decreased due to climate change.
The amount of water has increased due to the implementation of conservation laws.
A basic diagram of nutrient cycling is provided. What does substance X and substance Y represent?
Substance X is salt and Substance Y is water.
Substance X is carbon and Substance Y is nitrogen.
Substance Y is oxygen and substance X is carbon dioxide.
Substance X is nitrogen and Substance Y is ammonia.
The table shows a summary of the zones of an ocean ecosystem. Which of the following is a valid conclusion?
Organisms in Zone 1 must be able to withstand very cold water.
Producers in Zone 3 do not rely on Photosynthesis.
Organisms in Zone 3 must be able to tolerate occasional air exposure.
The warm water and abundant sunlight in Zone 2 limits the plankton population.
A student was studying how a change in abiotic factors can influence living organisms. She set up the experiment as follow:
1. Fill two glass fish tanks, labeled Tank A and Tank B, with 5 liters of water each.
2. Add a small fish and several plants to each tank.
3. Seal both tanks so that no air can leave or enter.
4. Place Tank A in a bright room and Tank B in a dark room.
The student noticed after 45 hours, the fish in Tank B died while the fish in Tank A remained healthy. Based on the results of the experiment described above, what is the best explanation for why the fish in Tank A lived and the fish in Tank B died?
Fish died in Tank B because the tank was sealed.
Fish died in Tank B because the temperature was too low.
Fish died in Tank B due to a lack of carbon dioxide.
The fish in Tank B died due to the lack of oxygen.
Heated water from an industrial building is expelled into a nearby lake. The release of this heated
water back into the lake would most likely result in which of the following?
an increase in the organic content of the lake
an increase in the number of mutations of plant species
decrease in the biodiversity of the lake
a decrease in the amount of sunlight needed for photosynthesis
There are many claims that a particular pesticide is effective in killing parasites that feed on wheat, but the same product causes harm to the overall environment. What is the strongest source of evidence to decide if the pesticide is good or bad for the environment?
Only the claims from the most experienced researcher should be considered.
All relevant studies should be evaluated to determine whether or not the pesticide has harmful effects
Only studies that show the pesticide is harmful should be considered.
The most recent research on the pesticide should be evaluated.
During a volcanic eruption, a forest is incinerated. Which of the following is true about this area?
Plants and animals will return after sucession,
Animals will return but plants will not.
Animals and plants will return to the area during ecological succession.
Plants will return but animals will not return.
As ecological succession progresses in an area that was previously disturbed, which of the following will happen?
biodiversity will decrease
biodiversity will increase
the ecosystem will be less stable
More organisms will become extinct.
A community plans to build a large manufacturing facility on previously undeveloped land. Which statement best describes how the local government should consider the effects of development on wildlife in the area?
local governments are not scrutinized by environmentalists
local governments do not have to consider the impact to endangered species
The needs of the developer are always considered over the needs of the environment.
Local governments need to consider if a species is endangered and at risk of extinction due to habitat destruction.
Coral reef systems are very sensitive to human impacts. Which of the following would be the best way humans can promote the survival of organisms that live in this critical habitat?
introduce new producers
introduce new diseases to get rid of pests
learn about the interactions of organisms
release extra CO2 into the atmosphere to help heterotrophs.
There is an area that has experienced changes in temperature, precipitation, and salinity levels in the local water supply, and there has been a consist decline in the populations of native species. Which statement below best describes the relationship between these environmental factors?
biotic factors are not impacted by abiotic factors
Abiotic factors limit the ability of species to live in the area
biotic factors are created by the abiotic factors in the area
biotic factors limit the ability of species to live in the area
In an ecosystem where foxes eat rabbits, the carrying capacity for both organisms has been reached. How would the emigration of rabbits affect the carrying capacity of the fox population?
It would cause a decrease in the carrying capacity of the owl population.
The carrying capacity of a population is rarely affected by emigration.
The carrying capacity of the owl population would remain the same.
It would cause an increase in the carrying capacity of the owl population.
Which if the following will most likely result in the decline of a population?
immigration and geographic isolation
emigration and births
immigration and births
emigration and deaths
After 1975, the wolf population continued to increase while the moose population experienced a decline during the same time period. What factor may have caused the increase in the wolf population
after the moose population reached carrying capacity?
found another food source
the emigration of the wolf
increase in the moose population
the introduction of a new moose predator
A city located in a boreal forest environment has grown significantly over the last few decades. Which statement best describes how the growth of the city would impact the boreal forest environment in the area?
The increase in pollution from the city would increase biodiversity in the boreal forest.
By destroying habitat to build homes and highways, the growth of the city would decrease the biodiversity in the boreal forest.
By bringing in water, the growth of the city would improve the entire boreal forest environment and increase the biodiversity.
The growth of the city would have little impact on the environment.
What is the most likely impact of returning the recovered salts of a desalination process back into the ocean?
Alterations in ocean salt levels would cause loss of species and unbalanced populations in marine food webs.
Decreased level of salt and minerals would pollute the ocean.
Nonrenewable resources in the ocean environment would become depleted and upset the ecosystem's balance.
Increased levels of salts and minerals in the ocean would result in overpopulation of marine bivalves due to strengthened shells.
