MCQ
Biological equilibrium is an equilibrium among the
- AProducers
- BProducers and consumers
- CDecomposers and producers
- ✓Producers, consumers and decomposers
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$a \quad\;b \quad\;c \quad\;d$

$i.$ In transcription, adenosine pairs with uracil.
$ii.$ Regulation of lac operon by repressor is referred to as positive regulation.
$iii.$ The human genome has approximately $50,000\; genes.$
$iv. $ Haemophilia is a sex-linked recessive disease.
| List $I$ (Interaction) | List $II$ (Species $A$ and $B$) |
| $A$. Mutualism | $I$. $+(A), 0(B)$ |
| $B$. Commensalism | $II$. $-(A), 0(B)$ |
| $C$. Amensalism | $III$. $+(A),-(B)$ |
| $D$. Parasitism | $IV$. $+(A),+(B)$ |
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