The external cell membrane. Even organisms as simple as bacteria have a cell membrane.
Prokaryotes do not have internal membranes but they still have external membranes.
Everything living thing has a cell membrane
De-extinction is a good idea. Using genetic science for reanimation may help adapt existing ecosystems to extreme changes in the environment, like global warming, and potentially reverse them, writes George Church in Scientific American
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Buffers in our blood are able to neutralize changes in the bloods pH.
Answer:
build or break down proteins
hope this helps :)
nutrition is the answer bcz without nutrition the diseases will effect more in a population