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Kerala PSC » Kerala PSC Study Materials » General Microbiology » Extremophiles
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Extremophiles

This article will take a close look at Extremophiles and how they survive in such extreme conditions.

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Extremophiles are organisms that exist in extreme environments. The natural world is home to many unique extremophiles, including deep-sea creatures and microbial life. However, there are an estimated 10,000 species of plant life that live in the wild. This number pales in comparison to the number of plants that have been grown since 1961. Extremophiles are some of the toughest organisms in the world and have adapted to live in extreme habitats. 

What is an Extremophile?

Extremophiles are organisms that thrive in a planet’s most extreme habitats, often surviving under truly unbelievable conditions. They’re frequently found close to geothermal vents, for example, or even inside nuclear reactors. Microbes can survive on ice and live in boiling water – these pint-sized critters represent one of the most widespread genera on earth. Some microbes have even been caught alive miles below sea level. The most extreme extremophiles, however, are found in the vacuum of space.

How do they survive in such an environment ?

Different extremophiles use different methods to survive in extreme habitats. For example, microbes living on the seafloor can protect themselves from the high pressure and toxic chemicals by surrounding themselves with a mineral shell. In some cases, the creatures themselves are naturally shielded from the harsh environment by using a thick chemical layer. For example, tardigrades (tough little animals sometimes called water bears) contain an organic molecule called trimethylamine within their cells that may make them resistant to radiation and dehydration.

Microbes caught in deep space have adapted to survive off energy sources other than sunlight; they’ve learned to live off of electricity and radiation coming from deep space. In cases where food is scarce, extremophiles can be incredibly resourceful. Some fungi will absorb metals from the ground and build a resilient casing around themselves that helps them fight off extreme heat and radiation.

Giant tube worms, for example, live in deep sea hydrothermal vents that spew boiling water into deep space. The creatures use bacteria in their bodies to process hydrogen sulphide from the vent; this provides them with both food and energy. When lava seeps into their homes, some of these tube worms are known to eject black-colored polyps, much like a type of flower that pushes out seeds when under attack. The polyps then form new colonies elsewhere.

How are Extremophiles different from any other organism?

One of the main traits that makes extremophiles unique is their ability to withstand extreme amounts of pressure, heat, or radiation. These organisms are able to survive in these conditions because they have evolved certain adaptations that allow them to live in harsh habitats. For example, some extremophiles have adapted to living on ice by building a protective layer of alcohol and other antifreeze chemicals; this allows them to keep cells intact when they’re exposed to freezing cold temperatures.

Extremophiles are also known for having extremely long life spans; some only reproduce once a year, but can still live for thousands of years.

Are Extremophiles found on Earth?

There are approximately 10,000 species of extremophile plants and animals found on earth. They range from microbes to tardigrades, mosses, and lichens. Some extremophiles are even known for thriving in extreme conditions that most organisms would not be able to survive in; for example, tardigrades can be frozen for decades and still emerge alive once thawed.

Extremophiles were first discovered in Yellowstone National Park in the United States; this is where Joseph Collett first coined the term “extremophile” in 1957. Collett was a microbiologist who specialised in studying the upper temperature limits of bacterial growth. He observed that bacteria were able to grow at temperatures up to 113 degrees Celsius, which was previously unheard of. He then took this discovery and used it as a model for how extremophiles could be used on other planets. Scientists have also been able to study several extremophile organisms on earth by allowing them to grow inside a greenhouse or laboratory. These organisms are easy to obtain and can be studied relatively quickly; for example, some scientists studying extremophiles prefer working with tardigrades because they’re easy to collect, reproduce quickly, and are visible under high magnification glasses.

Conclusion:

Many extremophiles can be found in the world, some we know of and some that still remain a mystery. Through studying extremophiles, we are finding new ways to survive in environments that once seemed impossible. Scientists are hoping to take this knowledge and apply it to how we might be able to live on other planets in the future. For now, scientists will continue to find new ways for us all to survive in harsh environments; these organisms are our best bet for survival. Extremophiles have been known to be able to survive in their harsh conditions through a vast array of adaptations (some kinds more than others).

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Frequently asked questions

Get answers to the most common queries related to the Kerala PSC Examination Preparation.

Can extremophiles be found on other planets?

 Ans :Extremophiles have recently been discovered in space and can actually survive in a vast array of conditions, ...Read full

Are there possible benefits to discovering extremophile organisms?

 Ans :Extremophiles can be found in many ways over time; some are found by accident, while others are discovered by...Read full

What are some organisms that live in extreme conditions?

Ans :There are many types of extremophiles found around the world, ranging from single-celled organisms to humans. O...Read full

 Ans :Extremophiles have recently been discovered in space and can actually survive in a vast array of conditions, from extreme temperatures to even the vacuum of outer space. However, these organisms are only able to survive under extremely harsh environments. The most ideal place for extremophiles would be around geothermal vents; these organisms could draw energy off of the steam coming off the vents, making them ideal for studying the distribution and living habits of extremophiles.

 Ans :Extremophiles can be found in many ways over time; some are found by accident, while others are discovered by microbiologists. Some microorganisms that can survive extremely harsh temperatures are discovered when miners stumble upon them while digging into the earth. For example, many extremophiles have been found at Yellowstone National Park in the United States. At Yellowstone, researchers have discovered a wide range of extremophiles that inhabit acidic hot springs and frigid snow banks. Other extremophiles are found through microbiology; scientists study microorganisms which were once thought to be incapable of living in harsh areas. For example, some scientists study tardigrades because they are known to be able to survive exposure to open space for great lengths of time; this is useful because it allows scientists to learn more about how humans could possibly live on Mars in the future.

Ans :There are many types of extremophiles found around the world, ranging from single-celled organisms to humans. One such organism is Tardigrades (or water bears), are eight legged microorganisms that have been known to survive in some of the harshest conditions. They have been known to survive exposure in extremely hot or cold temperatures, as well as being frozen solid. Tardigrades can also go without water for over a decade before they die. So unique is their survival that tardigrades have been used as a model organism to study how other microorganisms can survive in space. Tardigrades are also known for being extremely small and delicate creatures; these organisms are so small that most scientists cannot even see them under high magnification.

Although tardigrades can survive in harsh conditions, they do not possess any special adaptations for living in extreme environments. They grow just fine in water and when exposed to temperature or radiation, though some have been known to develop a shell of sorts over themselves to protect themselves from radiation.

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