Consider the following statements about food | vedclass

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(D) Statement $I$ is correct: $A$ food chain represents the transfer of energy from producers to top consumers through a series of organisms.Statement

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$I, II$ and $III$

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(D) Statement $I$ is correct: $A$ food chain represents the transfer of energy from producers to top consumers through a series of organisms.Statement $II$ is correct: By definition,a food chain is a single,linear pathway of energy flow in an ecosystem.Statement $III$ is correct: Energy flow in an ecosystem is always unidirectional,starting from solar radiation $\rightarrow$ Producers $\rightarrow$ Herbivores $\rightarrow$ Carnivores. It cannot flow in the reverse direction.Therefore,all three statements are correct.

$1$. Standing state	$p$. Mass of living material at a given time
$2$. Pioneer species	$q$. Amount of nutrients in the soil at a given time
$3$. Detritivores	$r$. Species that invade a bare area
$4$. Standing crop	$s$. Breakdown detritus into smaller particles

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