Muscles are an intricate part of the body. They allow the human body to move in many different ways. What are the two contracting proteins that make up a myofibril

a boiling water reactor does not boil the water. a pressurized water reactor boils the water faster. a pressurized water reactor is heated directly by the core. a pressurized water reactor does not use fission.

1 a

2 d

3 a

4 c

explanation:

answersilicon (si); oxygen (o);