Which of the following is correctly stated as happens in the common cockroach?
- AThe food is ground by mandibles and gizzard
- BMalpighian tubules are excretory organs projecting out from the colon
- COxygen is transported by haemoglobin blood
- DNitrogenous excretory product is urea
Solution & Step-by-step Explanation
In cockroaches, the mandibles (mouthparts) and the gizzard (part of the foregut) both help in grinding food particles.Malpighian tubules are at the junction of midgut and hindgut.Cockroaches lack respiratory pigments (haemoglobin); oxygen is transported via tracheae.They are uricotelic (excrete uric acid).