MCQ
In a food chain, the largest population is that of:
- AProducers.
- BDecomposers.
- CSecondary consumers.
- DPrimary consumers.
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| List $-I$ | List $-II$ |
| $a$ In lac operon $i$ gene codes for | $i$ transacetylase |
| $b$ In lac operon $z$ gene codes for | $ii$ permease |
| $c$ In lac operon $y$ gene codes for | $iii$ $\beta$ - galactosidase |
| $d$ In lac operon $a$ gene codes for | $iv$ Repressor |
Choose the correct answer from the options given below :
$I.$ Baculoviruses are pathogens that attack insects and other arthropods
$II.$ Most of these biocontrol agents belong to the genus Nucleopolyhedro virus
$III.$ They do not harm plants mammals, birds, fish and other non-target insects
$IV.$ Baculoviruses are helpful in Integrated Pest Management $(IPM)$ programme, in which beneficial insects are conserved
Choose the correct option