MCQ
Ovules are attached to a parenchymatous cushion called:
- ANucellus.
- BObturator.
- CConducting tissue.
- ✓Placenta.
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$(i)$ Fleming, Chain and Florey were awarded the Nobel prize in $1945$
$(ii)$ Antibiotics have greatly improved our capacity to treat deadly diseases
$(iii)$ Penicillin was used to treat American soldiers wounded in World War I
Reason : They are not recognised by $tRNA$.