Photosynthesis produces oxygen and water. Photosynthesis is the result of a cycle. Humans use oxygen for respiration, the product produced from human respiration is carbon dioxide. Then plants absorb carbon dioxide from the air and turn it into oxygen with photosynthesis, this goes on and on as a cycle.
I need more points. That's why I am awnsering this, sorry.
the skin covering the human body consists of 2 layers.
Answer:
Mutations in the HBB (beta-globin) protein causes symptoms of sickle cell disease.
Chemical energy --- electrical energy --- light energy