2-In what way is nitrogen important to life on Earth?
It is used in making DNA
It is used to make chlorophyll in plants
All of the above
None of the Above

What would happen if the krill were removed from the food web

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

When you run, you begin to breathe heavier and faster. your heart beats more quickly, bringing more oxygen to your cells. which organ systems are working together here?