L1
Humans can ensure that keystone species survive by
Passing laws that regulate hunting of species
In the event of toxic waste pollution, what happens to the amount of toxins as you move up the food chain
It increases (biomagnification)
Largest contributor to climate change
Burning fossil fuels
The direct manipulation of hereditary material (DNA)
Genetic engineering
The variety of living things, including species, genes, and ecosystems, in a certain area
Biodiversity
A stable ecosystem depends on
A high level of diversity within the environment
Increase in ocean temperatures could directly cause
Coral bleaching
Ocean levels to rise
True or False; the number of species that have gone extinct is directly related to an increase in human population
True
Which technique would allow us to use DNA from an extinct species to create an exact copy?
Cloning
A species that plays a critical role in maintaining the structure and biodiversity of an
How does poaching negatively impact an ecosystem?
Kills elephants which are keystone species, would cause the ecosystem to crumble
What role does the biosphere play in the carbon cycle?
Biosphere (system which includes all living organisms) absorbs CO2 from atmosphere (photosynthesis) and humans release CO2 (cellular respiration)
Why do invasive species often grow out of control?
Because they have no natural predators
Product of PCR
Large samples of DNA
Weighing pros vs cons when making environmental decisions
Trade-offs
What would happen if we removed owls from the following food web?
The amount of mice/rabbits/snakes (prey) would increase and the amount plants (producers) would decrease.
Outputs of cellular respiration
Carbon dioxide, water, (and ATP)
Deforestation directly results in an increase in
Carbon dioxide (CO2)
Cell type used when extracting DNA for cloning
Somatic cells (body cells)
When humans use too much of a resource (like animal tusks, fur, etc.) for their own benefit
Why should climate change be addressed globally and not just locally?
Due to its wide-reaching effects (like extreme weather)
As CO2 concentration increases, pH does what?
Decreases (gets more acidic)
Why is it important to reduce the amount of carbon dioxide in the atmosphere?
To keep the temperature of the Earth stable
Disadvantage of selective breeding
Decreases genetic variety
The ability of an ecosystem to recover from problems like drought or changes
Ecosystem resilience