Question

Comprehending worldwide relationships and long-term change involved in natural selection is not easy -- individuals are rarely able to witness such things personally. Various fields of scientific study contribute evidence useful for reconstructing the history of organisms and the relationships among them.

Answer 1

Evolution is the change in heritable traits of biological populations over successive generations.

What is evolution of life?

• Evolution has produced the variety of life that exists on Earth today. Since life first emerged on Earth between 3.5 and 4 billion years ago, it has continued to develop.
• At initially, there were just single-celled, primitive species on Earth.
• The first multicellular organisms appeared much later, and as a result, the diversity of life on Earth significantly increased.
• Darwin put out a substantial amount of evidence to back up his idea of evolution by natural selection.
• Evolution is the gradual alteration of a living thing's traits over time. Natural selection is the process of evolution.
• Through their DNA, organisms transmit their traits from one generation to the next.

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