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microorganism : friend and foe
microorganism : friend and foe
microorganism : friend and foe
microorganism : friend and foe
IT IS AN
MICROORGANISMS
Water and soil are full of tiny
organisms, thought not all of them fall
into the category of microbes.
Microorganisms or microbes are so
small in size that they cannot be seen
with the unaided eye. That is why
these are called microorganisms or
microbes .
Microorganisms are classified into four major
groups. These groups are bacteria, fungi, protozoa
and some algae. Some of these common
Microorganisms are shown in figs. 2.1-2.4.
Bacteria are a large domain of singlecelled, prokaryote microorganisms. Typically a few
micrometres in length, bacteria have a wide range of
shapes, ranging from spheres to rods and spirals.
There are typically 40 million bacterial cells in a gram
of soil and a million bacterial cells in a milli litre of
fresh water. Bacteria are vital in recycling nutrients.
TWO TYPES
OF BACTERIA
A fungus is a member of a large group of
eukaryotic organisms that includes
microorganisms such as yeasts and molds
(British English: moulds), as well as the
more familiar mushrooms. These organisms
are classified as a kingdom, Fungi, which is
separate from plants, animals, and bacteria.
microorganism : friend and foe
Protozoa are a diverse group of single cell eukaryotic
organisms, many of which are motile. Historically protozoa
were defined as single cell protests with animal-like
behavior, e.g. movement. Protozoa were regarded as the
partner group of protests to protophyta which have plantlike behavior, e.g. photosynthesis
EXAMPLE OF
PROTOZOA
Algae are a large and diverse group of
simple, typically autotrophic organisms, ranging from
unicellular to multicellular forms, such as the giant
kelps that grow to 65 meters in length. They are
photosynthetic like plants, and "simple" because their
tissues are not organized into the many distinct
organs found in land plants.
microorganism : friend and foe
Viruses are also microscopic. They,
however., reproduce only inside the cells of the host
organism. Which may be a bacterium, plant or animal.
Some of the Viruses are shown in fig.2.5. common
ailments like cold, influenza (flu) and most coughs are
caused by Viruses. Serious diseases like polio and
chicken pox are also caused by viruses.
A virus is a small infectious agent that can
replicate only inside the living cells of
organisms. Most viruses are too small to be seen
directly with a light microscope. Viruses infect
all types of organisms, from animals and plants
to bacteria and archaea.
EXAMPLES
OF VIRUSES
Diseases like dysentery and malaria
are caused by protozoa (protozoan)
whereas typhoid and tuberculosis
(TB) are bacterial diseases.
ANSWER THE
FOLLOWING
QUESTION
What is microorganisms?
Name four types of microorganisms?
Give two examples of protozoa and fungi?
By which microorganisms dysentery and malaria
is caused?
Name the serious diseases caused by viruses?
Where viruses reproduce ?
by which object we can see the microorganisms?
microorganism : friend and foe
GROUP “A”
TUSHAR SOLANKI , GAYATRI VALLAPH PAL ,
ARNAV SIKKEWAL , HIMANSHU GUPTA ,
ARYAN WAGADRE ,

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microorganism : friend and foe

  • 6. Water and soil are full of tiny organisms, thought not all of them fall into the category of microbes. Microorganisms or microbes are so small in size that they cannot be seen with the unaided eye. That is why these are called microorganisms or microbes .
  • 7. Microorganisms are classified into four major groups. These groups are bacteria, fungi, protozoa and some algae. Some of these common Microorganisms are shown in figs. 2.1-2.4.
  • 8. Bacteria are a large domain of singlecelled, prokaryote microorganisms. Typically a few micrometres in length, bacteria have a wide range of shapes, ranging from spheres to rods and spirals. There are typically 40 million bacterial cells in a gram of soil and a million bacterial cells in a milli litre of fresh water. Bacteria are vital in recycling nutrients.
  • 10. A fungus is a member of a large group of eukaryotic organisms that includes microorganisms such as yeasts and molds (British English: moulds), as well as the more familiar mushrooms. These organisms are classified as a kingdom, Fungi, which is separate from plants, animals, and bacteria.
  • 12. Protozoa are a diverse group of single cell eukaryotic organisms, many of which are motile. Historically protozoa were defined as single cell protests with animal-like behavior, e.g. movement. Protozoa were regarded as the partner group of protests to protophyta which have plantlike behavior, e.g. photosynthesis
  • 14. Algae are a large and diverse group of simple, typically autotrophic organisms, ranging from unicellular to multicellular forms, such as the giant kelps that grow to 65 meters in length. They are photosynthetic like plants, and "simple" because their tissues are not organized into the many distinct organs found in land plants.
  • 16. Viruses are also microscopic. They, however., reproduce only inside the cells of the host organism. Which may be a bacterium, plant or animal. Some of the Viruses are shown in fig.2.5. common ailments like cold, influenza (flu) and most coughs are caused by Viruses. Serious diseases like polio and chicken pox are also caused by viruses.
  • 17. A virus is a small infectious agent that can replicate only inside the living cells of organisms. Most viruses are too small to be seen directly with a light microscope. Viruses infect all types of organisms, from animals and plants to bacteria and archaea.
  • 19. Diseases like dysentery and malaria are caused by protozoa (protozoan) whereas typhoid and tuberculosis (TB) are bacterial diseases.
  • 21. What is microorganisms? Name four types of microorganisms? Give two examples of protozoa and fungi? By which microorganisms dysentery and malaria is caused? Name the serious diseases caused by viruses?
  • 22. Where viruses reproduce ? by which object we can see the microorganisms?
  • 24. GROUP “A” TUSHAR SOLANKI , GAYATRI VALLAPH PAL , ARNAV SIKKEWAL , HIMANSHU GUPTA , ARYAN WAGADRE ,