MCQ
Abyssal zone of oceans is characterized by
- APresence of sunlight and producers
- BAbsence of sunlight and all living organisms
- CAbsence of sunlight but presence of producers
- ✓Absence of sunlight and presence of consumers and decomposers
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| List $I$ | List $II$ |
| $A$. Frederick Griffith | $I$. Genetic code |
| $B$. Francois Jacob and Jacque Monod | $II$. Semi-conservative mode of DNA replication |
| $C$. Har Gobind Khorana | $III$. Transformation |
| $D$. Meselson and Stahl | $IV$. Lac operon |
Choose the correct answer from the options given below:
Reason: Histamine is a vasodilator.