Question
Question: The blood of cockroach contains no respiratory pigment. It means that...
The blood of cockroach contains no respiratory pigment. It means that
A
Respiration is anaerobic
B
Cockroach has no respiration
C
Oxygen goes into tissues with H2O from outside
D
Oxygen goes directly into tissues through tracheal system
Answer
Oxygen goes directly into tissues through tracheal system