Bilateral symmetry,metameric segmentation,coelom and open circulatory system are the features of

Anopheles eggs float in water due to

In which of the following is ‘swarming’ found?

In $Arthropoda$,the head and thorax are often fused to form a $cephalothorax$. However,in which of the following classes is the body divided into head,thorax,and abdomen?

Cockroach belongs to which class?

Exoskeleton of which phylum consists of a chitinous cuticle?