Exons, because they are the only coding regions in the DNA.
Hope this is helpful!
False , mitochondria create energy.
False, I'd say. Mammals usually adapt based on environment. Now, I know predators are "apart" of the environment, but I don't think that'd be it. I'd bet more money on saying mammals evolve based on environment adaptation. Sorry if I didn't answer your question or if I didn't get my point across well.
Yes ..................................
