MCQ
The main sources of biofertilizers are:
- ARhizobium like bacteria
- BCyanobacteria
- CFungi
- DAll of the above
Explanation:
Biofertilizer is a type of fertilizer containing living microorganisms, that enrich the nutrient quality of the soil. The main sources of biofertilizers are bacteria, fungi, and cyanobacteria (blue-green algae). They form a symbiotic relationship with plants, in which the partners derive benefits from each other.
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| Direction of $RNA$ synthesis | Direction of reading of the template $DNA$ |
| $(a)$ $5'-3'$ | $3'-5'$ |
| $(b)$ $3'-5'$ | $5'-3'$ |
| $(c)$ $5'-3'$ | $5'-3'$ |
| $(d)$ $3'-5'$ | $3'-5'$ |
$I.$ 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?
Reason: Plasmids are usually present in eukaryotic cells.