To make enzymes, hormones, and other body chemicals.
It’s true (a) because bones become brittle and easier to break if theyre not used. bones more frequently used become stronger.
Answer:
I believe it's A (dendrite), B (body), and then C (the end of the axon [name is escaping me])
Answer:
Major greenhouse gases include carbon dioxide, methane, nitrous oxide, and various synthetic chemicals. ... Carbon dioxide occurs naturally as part of the global carbon cycle, but human activities have increased atmospheric loadings through combustion of fossil fuels and other emissions sources