When does tooth decay start in our mouth ?

What is tooth decay ?

Why does tooth decay start when the pH of mouth is lower than 5.5?

When does the heart beat start in the human embryo?

Where does the food web start from?

Tooth decay start when the pH of the mouth is lower than-

Assertion (A) : Tooth decay starts when the pH of the mouth is lower than 5.5. Reason : Bacteria present in mouth produce bases.

Does even the type of food have any role to play on the ph of our mouth?

Imagine what happens if saliva does not secrete into mouth cavity.

What does a food chain always start with -

Tooth decay is caused due to.