fun fact for today a humming bird can remember the last time they went to a flower so they do not go to it for 2 days but after a whole day they visited over 500 flowers.So, they remember the 100 flowers that they have visited already that are spreaded out. Nobody really knows how a humming bird with a very small brain can do that.
Answer;
-Matrix
Explanation;
Matrix is used to maintain artificial wall around the tooth preparation.
Cavity preparation is the mechanical alteration of a tooth to receive a restorative material which will return the tooth and area to proper form, function and esthetics.
-Objectives of cavity Preparation: remove all defects and give the necessary protection to the pulp, locate the margins of the restoration as conservatively, form the cavity so that under the forces of mastication the tooth or the restoration will not be displaced and also Allow for the esthetic and functional placement of a restorative material.
The right answer would be b because as you learn more about it then it will become more clear
Answer:
Gà có trước vì trong trứng có protein đặc biệt chỉ gà mới đẻ được. Gà thì đột biến mà thành
Answer:
Aristotle
Explanation:
Aristotle was the first person to study the embryos of different species.