Why must gametes only contain half the amount of genetic information of the parent?

Which of the following statements is most likely a characteristic of an authoritarian government in africa

What did the pattern of earthquakes in the wadati-benioff seafloor zones show scientists? a.) earthquakes occur where the ocean floor reaches its highest temperatures. b.) many earthquakes take place 700 kilometers below the seafloor. c.) slabs of ocean floor return to the mantle in subduction zones. d.) ocean - trenches cause earthquakes.

How did geographic isolation affect the islands in the australasia ecozobne?