236. Recently, "oilzapper" was in the news. What is it ?

1. 1. It is an eco-friendly technology for the remediation of oily sludge and oil spills

   
   
   

   2. It is the latest technology developed for under-sea oil exploration

   
   
   

   3. It is a genetically engineered high biofuel-yielding maize variety

   
   
   

   4. It is the latest technology to control the accidentally caused flames from oil wells

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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237. The importance of ecosystem lies is

1. 1. Cycling of material

   
   
   

   2. Flow of energy

   
   
   

   3. Both a & b

   
   
   

   4. Its biomass

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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238. Primary consumer of a ecosystem is

1. 1. Producer

   
   
   

   2. Herbivorous

   
   
   

   3. Carnivorous

   
   
   

   4. Decomposer

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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239. The niche of an animal is best defined as ?

1. 1. The number of individuals of the species the environment will support

   
   
   

   2. The same as its habitat

   
   
   

   3. All the ways an animal fits into its environment

   
   
   

   4. The specific place within the habitat where the animal lives

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   NA

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240. Some water, a small amount of soil a, few green aquatic plants and a fish were placed in a large bottle. The bottle was sealed to prevent the exchange of gases and other materials between its contents and the outside. The bottle was placed in a window to receive light during the daytime. Is carbon dioxide produced by the plants ?

1. 1. Yes, but it is produced only at night when the plants can no longer carry on photosynthesis.

   
   
   

   2. It is produced all the time as a result of cellular respiration.

   
   
   

   3. No, it is a waste product of animals only.

   
   
   

   4. No, plants take in only the waste products exhaled by animals.

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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