Teaching BPSC बिहार मध्य विद्यालय (6 to 8) शिक्षक भर्ती 4.0 Mock Test General Science Biology Zoology
What is the network of air tubes for gas exchanges in insects called?
1
Trachea
2
Spiracles
3
Bronchi
4
More than one of the above
5
None of the above