Answer:
There are several eco-friendly techniques such as solar power plants, hydroelectric power plants, geotheraml enegy and wind turbines et-cetra, which have positive and negative both the impacts on environment that includes cryosphere, biodiversity, and human populations.
Positive impacts:
- Hydropower plant (energy generated from water) is clean energy source and do not cause any air pollution and is a domestic source of energy, so each state can produce their own energy.
- Wind turbines (energy generated from wind) are also clean energy source, do not cause any pollution, a renewable source of energy and provide power to remote locations.
- Geothermal enetgy (energy generated through earth's internal heat) is environmet friendly source and better then conventional fuel sources as it does not require fuel, have high potential and sustainable.
Negative impacts:
- Hydroelectric power plants are built by construction of dams and roads at water sites which affect the water habitat and also the destroys the nearby home of people. it affects the water flows in river and causes drought.
- installation of Wind turbines allows posses threat to birds because of their heights and produces lots of noise that disturb the human population nearby. It can affect the flow of wind which indirectly affect the climate or weather at cryosphere and allows melting of ice.
- Geothermal energy can cause cause earthquakes, nois pollution and destroy the native biodiversity.Geotheraml energy utilises heat inside the earth surface that affects the internal plates of earth of earth which disturbes the whole earth surface including cryosphere.
Hence, eco-friendly technologies have pros and cons both as mentioned above.
<u>Staphylococcus</u> <u>aureus</u> is a pathogen that can contaminate food if a food service worker sneezes on the food.
What is Staphylococcus aureus?
Staphylococcus aureus is a bacterium which is highly tolerant to salt, and can easily grow on food materials like meat, milk products etc.
Role in disease:
- S. aureus is found generally in soil, air and water. Research says it can also be found in nose, skin and other areas of human beings.
- Any food contaminated with this bacterium, can become toxic for consumption because the bacteria can easily multiply in the food, release toxin that can cause illness.
- Major illness caused by Staphylococcus aureus include Pneumonia, sepsis, toxic shock syndrome etc.
To learn more about Staphylococcus aureus, refer:
#SPJ2
Because their soft tissue and bones decay or get eaten before a fossil can be made.
Answer:
Option A, pathogen A
Explanation:
ID50 is a way to measure the virulent efficiency of a pathogen. ID50 for a pathogen depicts the number of pathogens required to infect or cause the associated disease with in 50 percent of any population sample.
This means that 50 pathogens A can infect 50 percent of any sample population.
While 1000 pathogen B and 1000000 pathogen C are required to infect 50 percent of any sample population.
hence, Most virulent pathogen is Pathogen A
