I believe it’s the first, third and fourth ones. I might be wrong and I’m sorry if I am.
Calcium ion is responsible for Muscle Contractions.
Answer:
A) chemical reactions.
Explanation:
"Photosynthesis is the process through which plants convert light energy into chemical energy. Here is the chemical reaction involved: As we can see, water and carbon dioxide combine to form glucose and oxygen. Since new chemical species are formed, photosynthesis is clearly a chemical change.
"
Answer:
The answer is true.. it is attached to the carbon backbone.
