Which of the following 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.
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.