Darwin's Theory of Evolution by Natural Selection

Darwin's Theory of Evolution by Natural Selection

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  • Look! A cheetah! Let me give you a quick history lesson on the cheetah and all other living things.
  • Hundred's of years ago,  it wasn't understood why not all of the cheetah's cubs survived after birth. It wasn't until Darwin's Theory in 1859, that we now know why.
  • The number of cubs this cheetah may have, won't be all that survive to be adults. This is because of overproduction.
  • Not all of the offspring an animal has can be able to survive, live to maturity, and reproduce.
  • All living things compete in their environment to survive. They are all looking for food, water, and places to live. Not all are able to survive due to the lack of resources nature has to offer. This is known as struggle for survival.
  • The cubs must compete for their mother's milk when they are young. The mom may not have enough to feed all her babies.
  • This Mother has big paws, so her babies will likely have big paws as well.
  • Although cheetahs are the same species, they have differences  in traits that are passed along to the next generation.  This could be height, colour, weight, or paw size.
  • The animals that are best suited to their environment survive, and those who are not as well suited either die or produce less offspring.
  • Although the cheetah is camouflaged well today, it may have not always been. The cheetahs with the best camouflage are able to hide from predators better,so they survive to pass the better camouflage onto its offspring.
  • Darwin's theory has yet to be proved incorrect, and is what is currently believed to be the correct theory of evolution. He displayed factual evidence that allowed this theory to become popular.
  • Over generations, new species happen because they inherit successful variations of other species that lived before them. This is known as Origin of a New Species.
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