UNIT 1
True or false
the 10% rule is loss of energy on the food web from the primary producers to the tertiary consumers.
TRUE
True or false
A biome are the plants and animals that are found in a particular region of the world .
True
A___ species is a species that is affected by non native species which causes the species population to decrease at a rapid rate .
Endangered species
a____ is a species that takes over a specific area that they are not native to and grow at a rapid rate .
invasive species
True or false
urbanization is caused by animals not by people
False
Only about 10% of energy is transferred from one trophic level to the next.
If producers contain 10,000 units of energy, how much energy will primary consumers receive?
A. 10 units
B. 100 units
C. 1,000 units
D. 9,000 units
the correct answer is c
Which of these are not a Bio-me
a:grassland
b:savanna
c:taiga
d:Madagascar
The correct answer is D
Match the evidence of climate change with its description
1. Ice cores A. Show past atmospheric CO₂ levels
2. Melting permafrost B. Releases trapped greenhouse gases
3. Rising sea level C. Result of ice melt and thermal expansion
A-1
B-2
c-3
Which one of these animals are not a generalist species.
a:rats
b: pandas
c:roaches
d:rabbits
the answer is b
which one of these answers does not explain factors that affect the total fertility in the human population .
A. the increase of job opportunities
B. the increase in healthcare
C. increase in education
D. increase in water
the correct answer is D
An ecosystem has 50,000 unites of energy at the primary producer level . using the 10% rule how much energy would be available at secondary consumer level ?
A.500 unites
B.5,000 unites
C. 500,000 unites
D.40 unites
the answer is A
if sea urchins were to be removed from the kelp forest ecosystem what would mostly happen the sea otter and the kelp in the ecosystem ?
A. the sea otters would eat kelp
B. the sea otter population would increase while the kelp species decrease .
C. the sea otter population would decrease while the kelp population decreases as well .
D. there will be no change
the answer is C
A scientist wants to study the relationship between atmospheric carbon dioxide and global temperature . Which one of these hypothesis are most testable?
A. Climate change is harmful to everything on earth
B. Carbon dioxide affects climate
C. If atmospheric CO₂ concentrations increase, then average global temperature will increase
D. Global temperatures change over time cause of people
The answer is C
A small population of birds are on a isolated island and they shows a low genetic variation what would be the long term outcome of this ?
A. an increase in the population
B. higher extinction risk
c. improve ecosystem resilience
D. the population would gain more genetic variations.
the answer is B
If a small town in Africa has no medical advancements and with no school for miles away and there is only farmland what would be the long term outcome ?
A. there would be high rate of kids being produced but also a high rates of kids dying .
B. there would be a lower rate of kids being born and a lower rate o them dying.
C. there will be no children born at all.
D.everyone dies off.
the answer is A
If forest is losing predators due to hunting. Describe how the removal of predators could create a positive or negative affect for the ecosystem.
Without predators, prey population of the increase due to the lack of predators but this could also cause the prey to overeat and out compete the other prey animals in the environment .
A drought occurs in a temperate grassland. Explain how abiotic factors like precipitation influence the survival of plant and animal species in that biome.
Low precipitation stresses plants, reduces food for animals due to limited resources.
Coral reefs are bleaching due to ocean warming. Explain how this affects in marine ecosystems.
Loss of algae reduces energy flow to corals and reef fish, which causes them to loose homes and shelter .
Engineers consider building wind turbines on a hill. Explain one environmental advantage and one potential unintended consequence.
one advantage from the turbines is Clean energy production and one Unintended consequence Can disturb bird migration and local wildlife.
A fish species is overfished. Describe how overexploitation leads to biodiversity loss and one strategy to prevent it.
Overexploitation is when people kill a bunch of specific animals for specific needs which reduces population size and biodiversity. we could make laws, acts , banns on killing these animals/ how much you can kill
What might happen to a food web if a keystone predator is removed from the ecosystem? Propose a strategy to prevent such disruptions.
Removing a keystone predator could cause prey populations to explode, which would overconsume plants and disrupt the ecosystem. To prevent this, a conservation plan could reintroduce predators or create protected areas to maintain balance.
How could you improve fish populations in marine biomes affected by changes in salinity and temperature?
Reduce overfishing and pollution, establish marine protected areas, and regulate water temperature through reforestation of upstream areas to provide shade and maintain aquatic ecosystems.
Develop a plan to reduce greenhouse gas emissions in a city while still supporting its energy needs.
Increase renewable energy sources, improve public transportation, and encourage energy-efficient buildings. Planting urban forests can absorb CO2 and improve air quality.
How could you improve the survival of specialist species on islands threatened by invasive generalist species?
Control or remove invasive generalist species, restore native habitats, and limit human disturbances. Monitor populations to prevent extinction
How could you improve human population health in areas with high infant mortality rates using ecosystem resources?
Provide clean water, sanitation, and access to nutritious food. Protect ecosystems that supply medicinal plants and resources to reduce infant mortality.