Food chain is a series of population, which starts with producers. It is concerning with
Biotic components only
Energy flow and transfer of nutrients
Both $(a)$ and $(b)$
Abiotic components and decomposers
Total energy fixed by an ecosystem is called
Flow of energy declines from low to higher trophic level in ecosystem, is mainly explained by
Which of the following habitats is most unsuitable for primary productivity
Nutrient immobilisation
In an ecosystem