Which of the following is correctly stated as it
happens in the common cockroach ?
(a) Malpighian tubules are excretory organs
projecting out from the colon
(b) Oxygen is transported by haemoglobin in
blood
(c) Nitrogenous excretory product is urea
(d) The food is ground by mandibles and gizzard
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Answer:
(a) Malpighain tubules are excretory organs projecting out from the colon
Explanation:
Excretion in cockroach takes place through 100-150 yellow coloured thin filamentous Malphigian tubules. They help in removal of excretory products from haemolymph. ... The cockroach uses its mandibles for holding and biting the food particles while gizzard is specialised in grinding.
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