Chloroplasts. They are only in green plant cells, so, unless you are a green plant, humans and flatworms would not contain them.
I don't know about the other ones but the sky is blue because molecules move from the sun than the red from the sun. The blue has separated from the sun.
Antibiotic resistance happens naturally due to genetic mutation through random selection, however, genetic drift occurs on purpose and tests which genes are stronger and should continue to be passed on to future generations. In most cases, genetic drift is needed and antibiotic resistance isn’t.
Pyrite, Wulfenite, Pyromorphite, Topaz, Gypsum, and Feldspar.
