TLS Online TPP Program

#Question id: 4975


The observation that tusks were limited to males in several species, and were apparently not used in food-gathering, is evidence that the tusks probably

#Unit 11. Evolution and Behavior
  1. were used by males during the sex act.

  2. were maintained as the result of sexual selection.

  3. are homologous to claws.

  4. were insignificant to the survival and/or reproduction of dicynodonts.