Which range of wavelength (in nm) is called photosynthetically active radiation (PAR) ?
1. 100 - 390
2. 390-430
3. 400 - 700
4. 760- 100,00
Which light range is most effective in photosynthesis ?
1. Blue
2. Green
3. Red
4. Violet
Chemosynthetic bacteria obtain energy from
1. Sun
2. Infra red rays
3. Organic substances
4. Inorganic chemicals