A) producers
B) primary consumers
C) secondary consumers
D) tertiary consumers
Correct Answer: A
Solution :
Ponds are generally shallower with depth less than 2m in pond ecosystem. Producers include phytoplankton (e.g., diatoms, Chlorella, Spirogyra, Chlamydomonas etc.), tree floating macrophytes (e.g., Lemna, Azolla), suspended macrophytes (e.g., Utricularia, Hydrilld), submerged plants (Vallisneria), floating leaved plants (e.g., Nelumbo), emergent plants (Sagittaria). Consumers comprise zooplankton (ciliates, flagellates, crustaceans) nekton (e.g., Water spider, amphibians, turtles, fishes). Benthos (e.g., Snails, crabs, prawns), water birds (duck, crane). Decomposers occur on the bottom.
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