MCQ
Largest animals belong to class
- AArthropoda
- BPisces
- ✓Mammalia
- DReptilia
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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
Select the correct option
$X-Y-Z$
$(i)$ The body of the cockroach is segmented and divisible into three distinct regions - head, thorax and abdomen.
$(ii)$ Blood vascular system is of closed type.
$(iii)$ They are monoecious and both seves have well developed reproductive organs.
$(iv)$ The development of P. americana is paurometabolus, meaning there is development through nymphal stage.