A physical change is basically a body change so like if a crayon is solid then sits in the sun for a long time it melts away that’s a physical change because it changes its physical appearance
Answer:
Depends on the situation Usually the hardest would be blood samples of the Unknown Subject. Again It depends on the situation.
A. because nothing else even makes sense
Myofibril. Thick filaments consist of myosin, held in place by titin filaments
