Explain: Cockroach is harmful for human beings.
(N/A) $\rightarrow$ Many species of cockroaches are wild and are of no economic importance.
$A$ few species thrive in and around human habitats.
They are considered pests because they destroy food and contaminate it with their smelly excreta.
They act as vectors and can transmit a variety of bacterial diseases by contaminating food material and water.
$A$ few species thrive in and around human habitats.
They are considered pests because they destroy food and contaminate it with their smelly excreta.
They act as vectors and can transmit a variety of bacterial diseases by contaminating food material and water.
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Similar Questions
$A$. Ommatidia $i$. For vision $B$. Trochanter $ii$. Fused with large and stout femur $C$. Coxa $iii$. Articulation with thorax $D$. Sclerites $iv$. Forming exoskeleton
Match the columns and choose the correct combination.
| $A$. Ommatidia | $i$. For vision |
| $B$. Trochanter | $ii$. Fused with large and stout femur |
| $C$. Coxa | $iii$. Articulation with thorax |
| $D$. Sclerites | $iv$. Forming exoskeleton |
Match the columns and choose the correct combination.
Medium
View SolutionWhich of the following statement$(s)$ is/are correct regarding cockroaches?
$(i)$ 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 sexes have well developed reproductive organs.
$(iv)$ The development of $P. americana$ is paurometabolous,meaning there is development through nymphal stage.
$(i)$ 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 sexes have well developed reproductive organs.
$(iv)$ The development of $P. americana$ is paurometabolous,meaning there is development through nymphal stage.
Medium
View SolutionCockroach egg is called as
Easy
View SolutionInsect metamorphosis having a distinct larval stage is called
Easy
View SolutionWhich one of the following does not occur in a cockroach leg?
Medium
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