The energy in food substances is released via chemical reactions that take place within the mitochondria which are present in some single celled organisms.
Answer:
Explanation:
Every living thing grows. It needs energy to grow. It gets energy through food. When it doesn't have enough energy, it won't grow as fast. When it does, it will grow normally. If it get's more than enough, it will grow faster. One exception is if that organism is a human, and is having a growth spurt.
