Which one of the following system constitutes the primary producers
Higher plants
Algal phytoplanktons
Bryophytes
All the above
What is the percentage of photosynthetically active radiation $(PAR)$, in the incident solar radiation.
Which of the following is producer of plant kingdom
In an ecosystem energy flows in
Why is the rate of assimilation of energy at the herbivore level called secondary productivity ?
The organisms, which attack dead animals are