MCQ
The least toxic nitrogen waste present in urine is:
- AAmmonia
- BAllantois
- CUrea
- ✓Uric acid
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$(I)$. pre and postsynaptic neurons are in very close proximity
$(II)$. pre and postsynaptic neurons are separated by synaptic cleft
$(III)$. impulse transmission is very fast
$(IV)$. electrical synapses are common in our system
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