What do saliva, tears, and nasal mucus have in common? all can be classified as biological barriers. all contain langerhans cells. all can destroy bacterial cell walls. all are part of the complement system.

All can destroy bacterial cell walls.

On edgen.uity the answer is C- All can destroy bacterial cell walls.

it would affect precipitation by causing flooding in some areas of the world due to climate increasing, causing the glaciers in the northern and southern pole of our planet to melt.

i wish you would have provided choices to simplify it and allow me to give an exact answer.

thinking it would be physical characteristics