The dominant second trophic level, in a lake ecosystem, is
Correct answer: B. Zooplankton
- A. Phytoplankton
- B. Zooplankton
- C. Benthos
- D. Plankton.
Explanation
A trophic level is a step or division of a food chain that is characterized by the method of obtaining its food. The two fundamental trophic levels are producers and consumers. Producers belong to the first trophic level. In a lake, the producers are mainly some rooted or floating plants and phytoplanktons.
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About Man and His Environment
Ecosystems include biotic and abiotic components, food chains and webs, energy flow, nutrient cycles, populations and ecological relationships. Pollution and conservation cover air, water, soil and noise pollution, their effects on organisms, biodiversity loss, protected areas, sustainable resource use and methods for reducing environmental damage.
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