In cockroach,the ootheca is produced by the secretion of:

In which part of the alimentary canal of a cockroach are the cuticular invaginations found?

How many spiracles are present in a cockroach?

Match List-$I$ with List-$II$ related to the digestive system of a cockroach.

List-$I$	List-$II$
$A$. The structures used for storing of food	$I$. Gizzard
$B$. Ring of $6-8$ blind tubules at junction of foregut and midgut.	$II$. Gastric Caeca
$C$. Ring of $100-150$ yellow coloured thin filaments at junction of midgut and hindgut.	$III$. Malpighian tubules
$D$. The structures used for grinding the food.	$IV$. Crop

Choose the correct answer from the options given below:

Describe the location and function of the following structures in a cockroach:
$(i)$ Malpighian Tubules
$(ii)$ Compound eyes

Which of the following statement$(s)$ is/are correct regarding the digestive system of cockroach?
$(i)$ Mouth opens into a short tubular pharynx,leading to a narrow tubular passage called oesophagus.
$(ii)$ Gizzard helps in grinding the food particles.
$(iii)$ $A$ ring of $6-8$ blind tubules called hepatic or gastric caecae is present at the junction of foregut and midgut,which secrete digestive juice.
$(iv)$ At the junction of midgut and hindgut is present another ring of $100-150$ yellow coloured thin filamentous Malpighian tubules which help in removal of excretory products from haemolymph.