Answer:
Unlike protons, electrons can move from atom to atom. If an atom has an equal number of protons and electrons, its net charge is 0. If it gains an extra electron, it becomes negatively charged and is known as an anion. If it loses an electron, it becomes positively charged and is known as a cation.
B. glycolysis is the answer
The correct order is -
Vessel spasm; plug formation; coagulation
A vascular spasm or vessel spasm is a sudden tightening of a blood vessel. The platelet plug or also called hemostatic plug formation is an accumulation of platelets formed in response to blood vessel wall injury. And coagulation or clotting is the process in which blood changes from a liquid to a gel thus forming a blood clot.
The technological advancement that was needed to be made before scientist began to observe cells was the invention of the microscope. I have answered this question before on here
