evolution through natural selection

• What is the definition of evolution?

  Evolution is the change in the inherited characteristics of a population over time through a process of natural selection
• How many different species of animals and plants are there on Earth?

  Nearly 9 million
• When did life first develop on Earth?

  More than 3 billion years ago
• What were the first life-forms on Earth?

  Very simple, single-celled organisms
• What is the process of evolution by natural selection?

  Individuals with beneficial traits are more likely to survive and reproduce, passing on those traits to their offspring
• How does natural selection lead to evolution in a population of rabbits?

  Rabbits with beneficial traits like thicker fur or better eyesight/hearing are more likely to survive and reproduce, passing on those traits to their offspring
• How can two populations of the same species become separate species?

  If the two populations become so different in phenotype that they can no longer interbreed to produce fertile offspring