Question

The amount of light energy converted to chemical energy by photosynthesis per unit time is called

• A. Trophic efficiency
• B. Biomass
• C. Secondary production
• D. Gross primary productivity
• E. Net primary productivity

Answer 1

The correct option is B Biomass

A. Trophic efficiency or ecological efficiency is the percentage of energy transferred from one trophic level to the next.

B. Biomass is the amount of living matter present in an ecosystem and is synthesised by the producers that convert light energy into chemical energy by the process of photosynthesis.

C. Secondary production or secondary productivity is the rate of energy storage at consumer's level i.e. herbivores, carnivores and decomposers.

D. Gross primary productivity is the total rate of photosynthesis including the organic matter used up in respiration during the measurement period.

E. Net primary productivity is the rate of storage of organic matter in plant tissues in excess of the respiratory utilisation by plants during the measurement period.

So, the correct answer is 'Biomass'.