The correct answer is: B. The energy content in a trophic level is determined is determined by considering a few individuals of a species in that trophic level.
A. Quantity of biomass in a trophic level at a particular period is called as standing crop. This is true. Standing crop is the total mass of living organisms in a particular area at a particular time.
C. The succession that occurs in newly cooled lava is called primary succession. This is true. Primary succession is the process of community development on a previously uninhabited area. It is a slow process that can take thousands of years to complete.
D. Rate of succession is faster in secondary succession. This is true. Secondary succession is the process of community development on an area that has been disturbed, but still has some soil and other organic matter. It is a faster process than primary succession because the soil and other organic matter provide a foundation for new plants to grow.
E. Phytoplanktons are the pioneers in the aquatic ecosystem. This is true. Phytoplanktons are small, photosynthetic organisms that live in the water. They are the primary producers in the aquatic ecosystem, and they provide food for other organisms in the food chain.
The energy content in a trophic level is determined by considering the total energy of all the organisms in that trophic level. It is not determined by considering a few individuals of a species.