Question

Maximum solar energy is trapped by

• A. Planting
• B. Cultivating
• C. Growing algae in tanks
• D. Growing grasses

Answer 1

The correct option is C

Growing algae in tanks

The correct option is C.

Explanation of the correct option:

1. Algae are various groups of predominantly aquatic photosynthetic organisms, including cyanobacteria, chlorophyte, and other eukaryotic algae.
2. They account for over 50 to 55% of the photosynthesis that takes place on Earth.
3. Most solar energy is captured by algae growth in tanks.
4. Algae can undergo photosynthesis most efficiently in the red and blue light spectra.
5. Algae have the ability to capture the most energy because they contain the water-soluble pigment phycocyanin, which comes in a variety of hues and catches the light of different wavelengths.

Explanation of the incorrect option:

Option A:

1. Although both methods utilize the energy that sunshine provides, they do it in various ways.
2. Solar cells generate electricity, whereas plants use the sun's energy to make chemical energy.

Option B:

1. Farm animals can also benefit from solar energy in agriculture.
2. Livestock can continue to graze since solar panels are positioned at least seven feet off the ground.
3. The panels provide the sun and shade that small animals like free-range chickens need.

Option D:

1. Sunlight gives plants the energy they require to develop and survive.
2. This process is known as photosynthesis.
3. The majority of solar energy is produced at wavelengths that are not good for photosynthesis.
4. Approximately 98–99% of the solar energy that reaches Earth is reflected off of leaves and other surfaces before being absorbed by other molecules, which heats the planet.
5. Thus, just 1% to 2% is available for plants to absorb.
   

Final answer: Maximum solar energy is trapped by growing algae in tanks.