Usually the FDA will show that type of stuff
Do as much as you can. Every step counts. If you're just starting out, start with 10 minutes a day and add more little by little. Work up to 10 minutes at a time, three times a day. You can also try for 15-minute spurts twice a day. Also if you don't have enough time to do a complete workout then you can just walk
The answer should probably be no if this is an assignment. But if not, you only live once, right? ;p
Plasma is the liquid component of blood, in which the red blood cells, white blood cells, and platelets are suspended. It constitutes more than half of the blood's volume and consists mostly of water that contains dissolved salts (electrolytes) and proteins.