The body cells in cockroach discharge their nitrogenous waste in the haemolymph mainly in the form of

In cockroaches,the excretory product is ........ .

The blood of a cockroach does not contain any respiratory pigment. This means that .........

Read the following statements and choose the correct option:
$(A)$ The cockroach nervous system consists of a series of fused,segmentally arranged ganglia.
$(B)$ Ganglia are joined in the cockroach by paired longitudinal connectives on the ventral side.
$(C)$ The nervous system is present on the dorsal side of the cockroach.
$(D)$ In the cockroach,the total number of ganglia is nine.

Which of the following is correctly described for a common cockroach $(Periplaneta \text{ } americana)$?

Which of the following statement$(s)$ is/are correct regarding the excretory system of a cockroach?
$(i)$ Excretion is performed by Malpighian tubules.
$(ii)$ They absorb nitrogenous waste products and convert them into uric acid,which is excreted out through the hindgut.
$(iii)$ In addition,fat body,nephrocytes,and urecose glands also help in excretion.