MCQ
They help in increasing soil fertility:
- APseudomonas and cereals
- BBacillus and Penicillium
- ✓Salvinia and Marsilea
- DNostoc and legumes
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$I.$ The transfer of energy from producers to top consumers through a series of organisms is called food chain
$II.$ A food chain is always straight and proceeds in a progressive straight line
$III.$ In a food chain, there is unidirectional flow of energy from sun to producers and subsequently to series of different types of consumers
Which of the statements given above are correct?