A food chain starts with

  • A

    Nitrogen fixing organisms

  • B

    Photosynthesis

  • C

    Respiration

  • D

    Decomposers

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If the plant producer dies in the ecosystem, then the system is

Major conduit of energy in land and aquatic ecosystem is transferred through ______ and ______ respectively.

Most animals that live in deep oceanic waters are

  • [NEET 2015]

$A$ : In secondary productivity, no new organic matter is formed.

$R$ : It is only utilisation of part of food manufactured by primary producers in building of consumer biomass.

$A$- Grasshopper is included in primary consumer.

$R$- Fishes and birds are included in top carnivore.