Answer:
C
Explanation:
Endergonic reactions use energy to <em>build bonds</em>
Exergonic reactions release energy through <em>breaking bonds</em>
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D. Electrons because isotopes deal with electrons.
Answer: A community is all of the populations of different species that live in the same area and interact with one another. A community is composed of all of the biotic factors of an area. An ecosystem includes the living organisms (all the populations) in an area and the non-living aspects of the environment.
Answer:
central nervous system
Explanation:
because it is under control of our brain
OOO IM SMART ITS PROPHASE