Question

Choose the correct statement(s) regarding the pond ecosystem.
I. Water is the abiotic component with all organic and inorganic substances dissolved in it.
II. Zooplanktons are consumers and fungi, bacteria are decomposers
III. Zooplanktons are consumed by phytoplanktons
IV. Radiant energy from the sun is trapped by phytoplanktons

• A. I, II and III
• B. II, III and IV
• C. I, II and IV
• D. II only

Answer 1

The correct option is C I, II and IV

Pond is an example of an aquatic ecosystem which consists of various abiotic and biotic factors which interact with each other. Water is the abiotic component with all organic and inorganic substances dissolved in it. Hence statement I is correct.

Radiant energy from the sun is trapped by organisms such as phytoplanktons, some algae, floating plants, submerged plants, some plants found at the edges of the pond, etc. They are autotrophic organisms (producers) that convert inorganic material to organic material with the help of solar energy.
Hence statement IV is correct.

Zooplanktons and other small fishes are the consumers of the pond ecosystems. The zooplankton are primary consumers which feed on the phytoplankton. Hence statement III is incorrect.
Various fungi and bacteria act as decomposers and break down complex organic matter present in dead plants and animals to simpler inorganic substances. Hence, statement II is correct.