Question

What do primary producers have available to convert into biomass?

• A. $10\%$ of secondary productivity
• B. Energy used for respiration
• C. Gross primary productivity
• D. Net Primary productivity

Answer 1

The correct option is D Net Primary productivity

The gross primary productivity or gpp is the rate at which solar energy is captured in sugar molecules during photosynthesis (energy captured per unit area per unit time).

Producers such as plants use some of this energy for metabolism/cellular respiration and some for growth (building tissues).

After deducting the amount of energy required for the plant's metabolism from the GPP, we get Net primary Productivity. This Net primary productivity is the amount of energy gets to transform into food for the next trophic level.

So, The correct answer is 'Net Primary Productivity'.