MCQ
The $R.Q.$ is more than one when the respirable matter is
- AProteins
- BFats
- ✓Organic acids
- DStarch
${\rm{R}}{\rm{.Q}}{\rm{.}} = \frac{{4C{O_2}}}{{1{O_2}}} = \frac{4}{1} = 4$ (More than one)
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$(i)$ 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.