Chapter 2 talks about three subatomic particles make up atoms, they are protons , neutrons electrons they make a nucleus.Chapter 7, talks about the cell theory the cell rtheory states all living thing are composed of cells.Cell are the basic units of structure and functions in living things.New cells are produce from existing cell.Chapter talks about photosynthesis how plants grow and store energy from the sun.chapter 9 is cellular respiration is the process that release energy by breking down glucose and other food molecules in the presence of oxygen. They are all elements that talk about ways that cells work.
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