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Adapting to the Environment

Adapting to the Environment. Charles Darwin British Naturalist Traveled aboard the H.M.S. Beagle Wrote “ On the Origin of Species” in 1859 - Evolution By Means of Natural Selection. Evolution by Natural Selection. Also called “survival of the fittest”.

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Adapting to the Environment

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  1. Adapting to the Environment

  2. Charles Darwin • British Naturalist • Traveled aboard the H.M.S. Beagle • Wrote “On the Origin of Species” in 1859 - Evolution By Means of Natural Selection

  3. Evolution by Natural Selection • Also called “survival of the fittest”. • Organisms that are best suited for their environment survive to produce offspring and pass their “good traits” onto their children. • Organisms that are not well suited, die, as do their “bad traits”. • Eventually, after many generations, the population contains more organisms with the “good traits”

  4. All organisms have the ability to produce more offspring than can possible survive

  5. The environment contains things that kill organisms.

  6. Individual’s traits differ or vary.

  7. Some traits give an advantage. Adaptation- An inherited trait that increases an organisms chance of survival.

  8. Animal Adaptations

  9. Chameleon

  10. Chameleon Adaptations • Long, sticky tongue • Blending coloration • Protruding eyes that move independently • Toes on feet and prehensile tail for grasping

  11. Golden Eagle

  12. Golden Eagle Adaptations • Large feet with long, curved talons • Hooked beak for tearing prey • Keen eyesight • Long, broad wings for carrying off prey

  13. Starfish

  14. Starfish Adaptations • Suction-powered tube feet to attach to prey • Strong, flexible arms for opening shellfish • Can eject stomach into shell of prey to digest meal (clams)

  15. Cougar

  16. Cougar Adaptations • Tawny coloration allows cougar to stalk undetected • Sharp, retractable claws for grasping prey • Powerful jaws with daggerlike teeth for killing prey • Muscular body ideal for running short distances quickly

  17. Red Fox

  18. Red Fox Adaptations • Long, muscular legs for running long distances • Keen hearing, sense of smell, eyesight, sharp teeth

  19. Because individuals with advantageous traits have more offspring, each new generation contains a greater proportion of these traits.

  20. Evolution on the Galapagos

  21. Co-evolution- Two or more organisms evolving in response to one another.

  22. Failure to evolve… • Leads to extinction – the irreversible disappearance of a population or species.

  23. Dodo Bird

  24. Great Auk

  25. Laysan Rail

  26. Passenger Pigeon

  27. Auroch

  28. Bluebuck

  29. Cape Lion

  30. What are our classroom pet’s adaptations? Milk Snake Coral Snake "Red on yellow will kill a fellow, but red on black is a friend of Jack." "Red on yellow, deadly fellow; Red on black, venom lack." "Red and yellow will kill you fellow; Red and black is friend Jack." Batesian Mimicry – Protection from predators

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