Explanation:
I think the answer is this for a better check mass- mass ratio in stoichiometry lesson
Answer:
Scientists were unsure about the last common ancestor between apes and humans because fossils are so scarce, researchers do not know what the last common ancestors of living apes and humans looked like or where they originated.
Explanation:
Https://www.youtube.com/watch?v=LXDG0nqYdR4
UV rays can be found In the sun and in tanning beds.
UV rays can cause cancer (skin) if proper skin health is not happening (sunscreen)
I hope this helps you!