Without staining them you wouldn't be able to see them
Answer:
Fever.
Explanation:
If gram-negative bacteria contain a small amount of Endotoxin in the circulatory system can cause different types of infections such as inflammation, bleeding, hypertension, clotting, and fever.
Endotoxin is known as glycolipids, lipopolysaccharide (LPS) the most potent toxic molecule which is capable of causing lethal shock. It is present in the bacterial cell wall.
There are three main types of rocks: sedimentary, igneous, and metamorphic that form the rock cycle. Hope this helps :)