What is the term for a break in the skin surface or mucous membrane that exposes underlying tissues:

Open wound

Explanation:

A wound refers to an injured portion in the body which can be categorised into two types: the open and closed wound.

The open wound is the wound which is caused when an injury occurs in the skin and exposes the internal tissue and parts of the body while closed wound does not expose the internal parts of the body.

Thus, the open wound is the correct answer.

explanation:

b,bacteria convert nitrates

into nitrogen gas.

d,plants and animals take in

and use nitrogen compounds.

e,bacteria break down waste    

products and return nitrogen  

to the soil.

a,bacteria convert atmospheric

nitrogen to ammonia.

c,bacteria convert ammonia

to nitrites and nitrates.