Choose correct sentence.

  • A

    Except for the deep sea hydro - thermal ecosystem, sun is the only source of energy for all ecosystems on earth of the incident solar radiation more than 50 percent of it is photo synthetically active radiation (PAR).

  • B

    Plant capture only $10-20$ percent of the PAR and this small amount of energy sustains the entire living world.

  • C

    All organisms are dependent for their food on producers.

  • D

    Primary producers in an aquatic ecosystem are zooplanktons.

Similar Questions

Which of the cycle is concerned with energy flow in the ecosystem

$...A...$ is required for higher primary productivity. $...B...$ have the lowest primary productivity as the soil is deficient in moisture.

Choose the correct option for $\mathrm{A}$ and $\mathrm{B}$

The zooplanktonic forms are

Nektons are

Total energy fixed by an ecosystem is called