What is used to make a cast of a tool mark?
resin
silicone rubber
plaster of paris
all of the above

All of the above

Explanation:

The tool mark is a mark which can be observed on the surface of the object when the sharp or blunt surface of the tool comes in contact with it. The class and individual characteristics of the tool mark can be collected by casting technique. This can be achieved by using formulations such as resin, silicon rubber and plaster of paris all these formulations are used in liquid form over the object from where the tool mark is required to be taken.

The tool marks on the casting material can be compared with the suspected evidence tool. So as to prove that tool was associated with crime.  

answer; i believe the correct answer is (progesterone);

what effect does exercise have on the nervous system?

the answer is c.