What would happen if earth had no atmosphere? a. the days would be hot and the nights would be cold. b. the days would be cold and the nights would be hot. c. earth would not have days. d. earth would not have nights.

How many variables are altered in a good experiment? a.1 b.0 c.2 d.3

How can a geological time scale best be reconstructed? a) comparing vestigial structures in living species b) comparing homologous structures in living species c) examining homologous structures in fossil remains d) examining the written records of scientists from past cultures

Both male and female gametes are created during the process of meiosis. the formation of male gametes is called spermatogenesis. after telophase il of spermatogenesis, there would be are all genetically male gametes created that