61. Largest flower Rafflesia is

1. 1. total stem parasite

   
   
   

   2. total root parasite

   
   
   

   3. partial stem parasite

   
   
   

   4. partial root parasite

   
   
   

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1. View Hint View Answer Discuss in Forum

   The tip of the root of Rafflesia makes haustorial contact with the root of host and absorbs food from the host.

   Correct Option: B

   The tip of the root of Rafflesia makes haustorial contact with the root of host and absorbs food from the host.

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62. Animals/organisms floating on the surface of water are

1. 1. plankton

   
   
   

   2. pelagic

   
   
   

   3. benthon

   
   
   

   4. neritic

   
   
   

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1. View Hint View Answer Discuss in Forum

   plankton

   Correct Option: A

   plankton

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63. 'Pond silk' is the common name of

1. 1. Spongilla

   
   
   

   2. Chlorella

   
   
   

   3. Selaginella

   
   
   

   4. Spirogyra

   
   
   

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1. View Hint View Answer Discuss in Forum

   Spirogyra is a freshwater alga found freely floating on the surface of the stagnant pools, ponds and ditches, etc. It is commonly known as water silk or pond silk.

   Correct Option: D

   Spirogyra is a freshwater alga found freely floating on the surface of the stagnant pools, ponds and ditches, etc. It is commonly known as water silk or pond silk.

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64. Which one is a link between chordates and nonchordates ?

1. 1. Sphenodon

   
   
   

   2. Balanoglossus

   
   
   

   3. Crocodilia

   
   
   

   4. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   Balanoglossus

   Correct Option: B

   Balanoglossus

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65. Ephedrine obtained from the stem of Ephedra is given to cure

1. 1. asthma

   
   
   

   2. respiratory disorder

   
   
   

   3. cold and cough

   
   
   

   4. All of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   All of these

   Correct Option: D

   All of these

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