Question

Plants capture only_________per cent of the photosynthetically active radiation (PAR).

• A. 50%
• B. 2-10%
• C. 1%
• D. 15%

Answer 1

The correct option is B 2-10%

Sunlight is the ultimate source of energy for all ecosystems. It is trapped and utilised by the photosynthetic producers (green plants, algae, some bacteria, etc) to prepare food.

Less than 50% of the total incident solar radiation is photosynthetically active radiation (PAR).

Only 2-10 per cent of the PAR is captured by the plants and this little amount of energy is enough to sustain the entire living world.