31. Algae are important for human being because

1. 1. It can be turned to important diet in future for human

   
   
   

   2. It purifies atmosphere

   
   
   

   3. It can be grown in water tank

   
   
   

   4. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: A

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32. "The walking fern" is so named because

1. 1. Its spores are able to walk

   
   
   

   2. It is dispersed through the agency of walking animal

   
   
   

   3. It propagates vegetatively by its leaf tips

   
   
   

   4. It known how to walk by itself

   
   
   

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1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: C

   N/A

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33. Bacteria are grouped under plant because

1. 1. They can not move

   
   
   

   2. They have cell wall

   
   
   

   3. They multiple by fission

   
   
   

   4. They are found everywhere

   
   
   

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1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: B

   N/A

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34. Statement which is true about bacteria

1. 1. All bacteria are autotrophs

   
   
   

   2. All bacteria are heterotrophs

   
   
   

   3. Most of them are heterotrophs but some are autotrophs

   
   
   

   4. All bacteria are photosynthetic

   
   
   

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1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: C

   N/A

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35. Which one of the following is a living fossils of plant?

1. 1. Ginkgo

   
   
   

   2. Pinus

   
   
   

   3. Mirabilius

   
   
   

   4. Dalbergia

   
   
   

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1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: A

   N/A

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