all of todays species have evolved from simple life forms that first started to develop over 3 billion years ago
darwin theory
successful organisms that survive are more likely to reproduce and pss on the genes for the characteristics that made them successful to their offspring. Over time, beneficial characteristics become more common in the population and the species- it evolves
the development of a new species is called speciation
happens when populations if the same species change enough to become reproductively isolated- meaning they cant be interbreed to produce offssprings
