Q. The characteristic color of the Red Sea is associated with heavy blooms of __________________

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Q. Aquatic bacteria tend to be Gram-negative.

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Q. Which of the following genus of bacteria is not found in fresh waters?

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Q. The primary producers in the marine system are ________________

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Q. The primary producers transform radiant energy into heat energy.

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Q. The biological activity of an aquatic ecosystem is dependent upon which of the following factors?

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Q. Which of the following water bodies, the role of photosynthetic organisms is considerably reduced?

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Q. Which of the following aquatic organisms contribute in a small amount to the shallow estuary food web?

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Q. Which among the following are referred to as the “pasture of the sea”?

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Q. The term fertility of oceans is used to express the capacity for production of inorganic matter.

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Q. What amount of dry organic matter is produced by the deep ocean areas?

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Q. Which among the following factors are limiting growth of phytoplankton organisms?

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Q. Which among the following oceans is the most richest in life?

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Q. In which of the following water bodies, fertility is high?

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Q. Which of the following product is not obtained from dissimilation of organic matter under aerobic conditions?

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Q. Which of the following organism have siliceous skeletons?

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Q. The nonsymbiotic bacteria which fix nitrogen live in the soil independently are

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Q. Nitrogen fixation by the microorganisms can be detected by adopting the approach of

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Q. Which of the following is not the biofertilisers producing bacteria?

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Q. Which of the following is capable of oxidizing sulfur to sulfates?

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