Which statement describes natural selection? It is the primary mechanism for evolution. It must act on structural traits. It acts to cause overpopulation. It causes learned skills to become heritable traits.

An effective moderator of a group discussion tells participants what they should say. encourages contention and disorder. introduces personal opinions into the discussion. helps the group remember the rules of discussion.

The $\square$ of a discussion keeps the group on track. A bc speaker listener moderator overseer

The $\square$ of a discussion keeps the group on track. Abcl 4 speaker listener moderator overseer

Question 7 of 20 Touching another person's skin allows pathogen transmission via air. body fluids. direct contact. fecal-oral route. Question 8 of 20