B.
All dentist equipment is used in the mouth. Many deseases, bacteria and viruses are transmitted trough saliva, and not all of these are weak. So, that is why we clean the dental operatory, to lower the chances of transmitting anything.
Hope it helped,
BioTeacher101
Origins of life number 4 is living beings
<span>the way that Jenner form his hypothesis from this observation is : he asked what would happen if he deliberately inoculated someone with cowpox fluid from another person
based on that observation he crated an experiment which later proof that you can't get another pox if you already experienced it once</span>
Milk contains a lot of proteins in them it contains calcium protein potassium iodine. Phosphorus. It also contains vitamins b1 and b12.
