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Q.

Which of the food chains directly depends on solar radiation?


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a

Predator

b

Grazing

c

Detritus

d

None of the above 

answer is B.

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Detailed Solution

Concept: Solar radiation is required for the growth of plants that serve as primary producers of food, such as grasses, shrubs, and leaves, as it aids in the process of photosynthesis, which results in the generation of food.
All ecosystems, with the exception of the deep sea hydrothermal ecology, rely heavily on solar radiation as a source of energy. Less than 50% of the solar radiation that strikes the earth's surface is photosynthetically active radiation (PAR). The primary producer is the only source of energy for the primary consumer, who is fully dependent on it.
Hence, the correct answer is option 2.
 
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Which of the food chains directly depends on solar radiation?