The steady state theory of the origin of the universe is another name for the big bang theory. true or false.

Which group of chordates does  notpossess true backbones?                 a.  birds      b.  frogs and toads      c.  lampreys      d.  crocodilians

Explain why in any given geographical region, women tend to have lighter skins( by 3-4% on average) than men?

In general, characteristics that an organism survive and reproduce become more common in a population over time. what mechanism of evolution cause this change?