Cescribe the Respiratory cavities of cockroach.
Blood of Periplaneta does not carry oxygen because
Mention the function of the following
Malpighian tubules
Select the correct sequence of organs in the alimentary canal of cockroach starting from mouth
Location and Function :
$(i)$ Malpighian Tubules
$(ii)$ Compound eyes
Which of the following statement(s) is/are correct about nervous system of cockroach ?
($i$) It consists of a series of fused segmentally arranged ganglia joined by paired longitudinal connectives on the ventral side.
($ii$) There are six ganglia lie in the thorax, and three in the abdomen.
($iii$) The sense organs are antennae, eyes, maxillary pulps, labial pulps and anal cerci etc.
($iv$) Each eye consists of about $5000$ hexagonal ommatidia.