Do potato and mushroom contain enzymes?

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

What is the farthest destination to date for a human spaceflight mission?

What environmental cues and landmarks do the geese use to determine the timing and direction of their migration over the mountains? how do they find their way?