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20. Energy flow in the ecosystem, classification of ecosystem, trophic levels

Identify the $2$ correct answer from the $5$ statements:

Answer variants:

Only about

$10 \%$ of the energy goes to next trophic level

Solar energy is the ultimate source of energy

Food web is a series of living creatures which represent eating and being eaten

Used batteries are disposed through incineration

Concentration of toxic chemicals is maximum in producers

Correct statement $1$ :

Correct statement $2$ :

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