Stars and planets, i guess.
Energy is interrelated on Earth; people need to manage Earth's natural resources to meet current and future needs that effect the entire planet.
Hope that helped!
Answer:
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Explanation:
Answer:
Plants need a rigid structure. Animal cells have flexible cell membranes. So animal cells can have a variety of shapes, but plant cells can not, they have to take the shape of their cell walls. Both plant and animal cells are eukaryotic, so they contain membrane-bound organelles like the nucleus and mitochondria.
