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Science differences [2marks]

Microorganisms: Friend and Foe · Jharkhand Board (JAC) STD 8 (Jharkhand - English Medium). 3 questions.

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differences [2marks]

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3 questions · self-marked practice — reveal the answer and mark yourself.

Question 12 Marks
Viruses and Bacteria
Answer
  Viruses   Bacteria
$1.$ AS viruses are very Minute, they can be seen with an electron microscope only. $1.$ Bacteria can be seen with a compound microscope.
$2.$ They do not have cellular structure. $2.$ They possess cellular structure.
$3.$ They are definitely harmful to us. $3.$ They are useful as well as harmful to us.
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Question 22 Marks
Fungi and Algae
Answer
  Yeast   Mould
$1.$ There is no chlorophyll or other pigment in their cells. $1.$ There is chlorophyll or other pigment in their cells.
$2.$ They are mostly White or black. $2.$ They are green or of different colours.
$3.$ They are either parasitic or sapro- phytic. $3.$ They are autotrophic.
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Question 32 Marks
Yeast and Mould
Answer
  Yeast   Mould
$1.$ Yeast is a unicellular fungus. $1.$ Mould is a multicellular fungus.
$2.$ It can sustain its life with oxygen or in the absence of oxygen. $2.$ It requires Oxygen for living.
$3.$ lt is beneficial] fungus. $3.$ It may beneficial harmful fungus.
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