Which option gives the correct cause-and-effect relationship for Variation and evolution, Evolution: students must explain how variants with phenotypes best suited to an environment are selected.

The correct option is Correct cause and effect: Mitosis maintains chromosome number; meiosis halves chromosome number. This matches Evolution because students must explain how variants with phenotypes best suited to an environment are selected.. It is the only option that keeps Mitosis vs meiosis separate and answers the approved learning objective in Evolution.

The correct option is Correct cause and effect: Mitosis maintains chromosome number; meiosis halves chromosome number. This matches Evolution because students must explain how variants with phenotypes best suited to an environment are selected.. Correct cause and effect: Mitosis maintains chromosome number; meiosis halves chromosome number. This matches Evolution because students must explain how variants with phenotypes best suited to an environment are selected. is correct because Mitosis maintains chromosome number; meiosis halves chromosome number. The learning objective says students must explain how variants with phenotypes best suited to an environment are selected, so the answer must stay inside Evolution. The alternative options are wrong because they either claiming meiosis is used for body growth., claiming mitosis produces gametes., or drift away from mitosis questions must focus on identical cells, growth, repair, asexual reproduction, or maintained chromosome number..