Question

These observntions show that water
and soll are full of tiny organisms
though not all of them fall into the
category of microbes. These
microorganisms or microbes are so
small in size that they cannot be seen
with the unadded eye. Some of these,
such as the fungus that grows on bread.
can be seen with a magnifying glass.
Others cannot be seen without the help
of a microscope. That is why these are
called microorganisms or microbes.
Microorganisms are classifed 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
Viruses are also microscopic but are
different from other microorganisms.
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 (lu) and
most coughs are caused by viruses
Cerious diseases like pollo and chicken
pox are also caused by viruses)
Diseases like dysentery and malaria
are caused by protozoa(protozoans)
whereas typhoid and tuberculosis (TB)
are bacterial diseases.
You have learnt about some of
these microorganisms in Classes VI
and VIL​

Answer 1

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Explanation:

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