Either number 1 or number 3.
Bahahaha I don't even know.
sorry
The dorsal side of the frog is the back of the frog, where the spine is.
Hello there :)
I am quite sure this is a true/false question
This statement is false.
Yes, the cilia and mucus in the trachea does sweep upward, however, it moves the mucus towards the pharynx where it is swallowed not towards the nose where it is sneezed out.