The percentage of the light energy absorbed by photosynthetic algae from the sun that is available as food for herbivores in the oceans is 2 percent (Option b).
- Photosynthesis refers to the metabolic reactions by which algae and plants produce energy which is stored in the chemical bonds of simple carbohydrates (glucose) by using the energy from the sun and carbon dioxide.
- The photosynthetic efficiency can be defined as the fraction of light energy from the sun that is successfully converted (and stored) into chemical energy.
- Algae only convert 2-3% percent of incoming sunlight into organic compounds, the remaining 98% is lost as heat.
In conclusion, the percentage of the light energy absorbed by photosynthetic algae from the sun that is available as food for herbivores in the oceans is 2 percent (Option b).
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