Answer:
To be stained is to kill the organisms on the slide and to fix
Exercise keep you active and keep you blood pumping and it keep you have alot of weight on u that my cause heart promblem are body promblem
Every type of exercise requires the use of oxygen to produce energy.
Good luck!..
The normal amount of time a person should have to exercise is about 30 minutes a day. Although, since a teenager is usually still developing muscle strength, they should exercise at least an hour a day.
