Which molecule is a source of carbon, hydrogen, and oxygen atoms for making proteins? water
salts
carbohydrates
carbon dioxide

In natural selection, what is actually “selected? ” a) alleles are directly selected b) genotypes are directly selected c) phenotypes are directly selected d) entire populations are directly selected

What noticeable trend from this graph might be used to make a conclusion?

What kind of bond is created by the attraction between atomic particles of opposite charge? ionic bond hydrogen bond covalent bond nuclear bond