How does the Coenzyme-A become Acetyl-CoA and what must first happen to the Pyruvic Acid?

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

Which describes the changes in the earths motion?

Which if the following best describes why invertebrates isn’t considered a scientifically valid word when classifying animals