91. Red snow causing alga is

1. 1. Chamydomonas nivalis

   
   
   

   2. Chlamydomonas reinhardtii

   
   
   

   3. Chlamydomonas debaryanum

   
   
   

   4. Chalmydomonas media

   
   
   

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   Chamydomonas nivalis

   Correct Option: A

   Chamydomonas nivalis

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92. Two bacteria found to be very useful in genetic engineering experiments are

1. 1. Escherichia and Agrobacterium

   
   
   

   2. Nitrobacter and Azotobacter

   
   
   

   3. Rhizobium and Diplococcus

   
   
   

   4. Nitrosomonas and Klebsiella

   
   
   

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   Escherichia and Agrobacterium

   Correct Option: A

   Escherichia and Agrobacterium

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93. Silver fern is

1. 1. Adiantum

   
   
   

   2. Cheilanthes

   
   
   

   3. Selaginella

   
   
   

   4. Equisetum

   
   
   

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   Cheilanthes

   Correct Option: B

   Cheilanthes

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94. Smooth muscles are likely to be found in

1. 1. muscles of legs

   
   
   

   2. muscles of arms

   
   
   

   3. stomach

   
   
   

   4. heart

   
   
   

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   The smooth muscles fibres taper at both ends (fusiform) and do not show striations. Cell junctions hold them together and they are bundled together in a connective tissue sheath. The wall of internal organs such as the blood vessels, stomach and intestine contain this type of muscle tissue.

   Correct Option: C

   The smooth muscles fibres taper at both ends (fusiform) and do not show striations. Cell junctions hold them together and they are bundled together in a connective tissue sheath. The wall of internal organs such as the blood vessels, stomach and intestine contain this type of muscle tissue.

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95. Bacteria are (were) considered more as plants than animals because of the presence of

1. 1. small nucleus

   
   
   

   2. plasma membrane

   
   
   

   3. cell wall

   
   
   

   4. spore formation

   
   
   

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   cell wall

   Correct Option: C

   cell wall

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