1. Which one of the following processes takes place in lakes during eutrophication?

1. 1. Rapid destruction of algal growth

   
   
   

   2. Excessive availability of dissolved oxygen

   
   
   

   3. Loss of dissolved nutrients from water

   
   
   

   4. Excessive entry of nutrient into water

   
   
   

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   N/A

   Correct Option: D

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2. Which of the following plants is referred to as a living fossil?

1. 1. Ephedra

   
   
   

   2. Cycus

   
   
   

   3. Gingko

   
   
   

   4. Adiantum

   
   
   

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   N/A

   Correct Option: C

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3. Softening of mature ripe fruit is due to

1. 1. Dissolution of middle lamella

   
   
   

   2. Degradation of primary wall

   
   
   

   3. Delignification

   
   
   

   4. Removal of suberin deposits in cell wall

   
   
   

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   N/A

   Correct Option: A

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4. Which one of the following crops would be preferred forsowing in order to enrich soil with nitrogen?

1. 1. Wheat

   
   
   

   2. Mustard

   
   
   

   3. Sunflower

   
   
   

   4. Gram

   
   
   

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1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: D

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5. Which of the following vegetable is obtained from wild cabbage?

1. 1. Lettuce

   
   
   

   2. Brocoli

   
   
   

   3. Kale

   
   
   

   4. Kohlrabi

   
   
   

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1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: D

   N/A

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