Question

Most primary productivity of pond is by

• A. Phytoplankton
• B. Zooplankton
• C. Floating plants
• D. Red algae

Answer 1

Answer: (A)

In an ecosystem, energy stored at the producer level is called as primary productivity. Energy stored at the consumer level is called as secondary productivity. Gross primary productivity is the rate of photosynthesis. Net primary productivity is the rate of storage of organic matter except which is utilized for the respiration by plants. In pond ecosystem, the most primary productivity is by phytoplanktons. They are producers. They convert the solar energy into chemical energy by the process of photosynthesis.

Thus, the correct answer is 'Phytoplankton.'