20 teeth
By the time the embryo is eight weeks old, there are ten buds on the upper and lower arches that will eventually become the primary dentition. These teeth will continue to form until they erupt in the mouth.
Antibiotics can
1) stop bacteria from growing and dividing by interfering with nutrient uptake (bacteriostatic)
<span>2) kill bacteria by disrupting cell wall (bacteriolytic) </span>
The correct answer is 0.4.. hope this helps !
Nicotine is highly addictive so i would go with something that is common in each of those