Why do you need a microscope to determine if something is living?

Johnny rode his bike 4 blicks down the street to his friend's house once he got to his friend house and realized he could not cone out to play he turned aroubd and went back home. what is displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point

The importance of the mind as a part of the body is an example of:

Agroup of students want to live a healthier life style they decide to use one of these following vegetable oils for cooking apex