In which phylum are compound eyes found in animals?

Cockroach is included in the ............ phylum.

$A$: Chitinous exoskeleton is a characteristic feature of arthropods.
$R$: It allows diffusion of water vapour from atmosphere to the body.

Which of the following is a tracheate group?

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

Which one of the following is a living fossil?