If im not mistaken plant cells go through a stage called photosynthesis meaning the cells can create it's own energy (food) off of water, Co2 and sunlight.
The number of <u>protons</u> in the nucleus determines an element's atomic number.
The Cell Membrane.
The Cell Membrane wraps around the entire cell and only allows certain things to pass through, blocking out potentially harmful things from the organelles within the cell.
Hope this helps!
They are substitution reactions
hope that helps
