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Animal Adaptations
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Animal Adaptations

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  1. Animal Adaptations The Big Question

  2. This past Sunday… • I went to an animal hospital because my bunny was sick. 

  3. Alfred Russel Wallace -British explorer and scientist

  4. His Question (1858) • Question: How do animals change??? • Answer: On the whole, the best fitted live and pass down their genes.

  5. Survival of the Fittest • Survive: • To go on living, to not die

  6. Survival of the Fittest • Fit:

  7. Survival of the Fittest • Fit: • In good health, in good shape

  8. Survival of the Fittest • The best fitted will live. • The healthiest animals survive from disease. • The fastest animals survive from being eaten.

  9. OK… So, how do animals change? • Long, long time ago, giraffes had shorter necks. • There was too much competition for food. • Some giraffes had a bit longer necks. • They could find food better!

  10. Animals Change Over Time • Long, long ago…

  11. Animals Change Over Time • Long ago…

  12. Animals Change Over Time • A bit long ago…

  13. Animals Change Over Time • Nowadays…

  14. Variations • Variations: differences in animals • Example: Some giraffes had little bit shorter necks, and some giraffes had little bit longer necks.

  15. Passing Down Traits • Animals pass down their traits to their offspring. • Pass down • Traits • Offspring   Child (offspring) Child (offspring) parent parent

  16. Natural Selection • Nature: the world of living things and outdoors • Select: to choose • So… What is natural selection? • Similar to the idea of “survival of the fittest” • Nature chooses who will survive and who will die

  17. You’ve Got Mail! • Wallace sent his ideas to Charles Darwin • Charles Darwin: a respected scientist in England

  18. Charles Darwin • He was shocked to see Wallace’s finding! • It was too similar to what he has been working on! • Charles Darwin: the father of evolution • Evolution: • a theory which states that animals evolve (change) over time

  19. His Work on Galapagos Islands • Galapagos Islands

  20. Galapagos Finches • Finch: a type of bird • Darwin saw many variations. • He came up with the theory of natural selection by studying these finches.

  21. Clever Compromise • Wallace’s and Darwin’s works were published together. 