A) non-collapsible wall
B) supporting rings
C) ectodermal origin
D) endodermal origin
Correct Answer: B
Solution :
A tracheal tube in insects develops as the imagination of the ectoderm. To prevent its collapse under pressure, a thin reinforcing wire' of cuticle called the taenidia winds spirally through. it's membranous wall. The absence of taenidia in certain parts of the trachea allow the formation of collapsible air sacs.
You need to login to perform this action.
You will be redirected in
3 sec
