Hello!
Your answer is <span>geographical time scale
Hope this helps :)
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The plants were providing the necessary oxygen for the animals to breathe and the animals were serving as an aide in photosynthesis for the plants by producing carbon dioxide.
I believe the answer is B. Heart
I have math language arts, gym, history/social studies, science, and spanish
Activation energy is required to start a chemical reaction. Activation energy is the energy needed to allow the reactant to react. Activation energy is measured in Joules (J).
