Unit b  - section 1.2 structure and function
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Unit b - section 1.2 structure and function

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Structure and Function

Structure and Function

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Unit b - section 1.2 structure and function Presentation Transcript

  • 1.  Living things will have to do certain things in order to stay alive Animals have to move, eat and exchange gas (breathe) Plants exchange gas and absorb nutrients
  • 2.  Organisms have developed many different ways to accomplish this through; ◦ Body parts – Called Stuctures ◦ Eg. Humans breathe through use of lungs ◦ Grasshoppers breathe through holes in their abdomens ◦ Fish through gills ◦ Etc…
  • 3.  All organisms have to perform certain functions in order to stay alive such as breathing Plants and animals have developed different ways to accomplish each task
  • 4. Some have fins
  • 5.  Tentacles
  • 6.  Insects have pincers
  • 7.  Mammals have teeth
  • 8.  Some mammals use their tongues because they lack teeth
  • 9.  Many animals will have the same structure but it may be a tad different On the Galapagos Islands a famous study by Charles Darwin compared 13 closely related species of finches to each other Can you spot the difference?
  • 10.  Although these finches are of a similar species they had different features to perform the same task Each of the bill types worked best for the food on that section of the Islands Look at page 92 in textbook to see uses of each finch beak ◦ Pointy was for insects in bark, Parrot shaped was for fruit, similar parrot shape for nuts and seeds
  • 11.  This study opened the door to the idea of evolution and Darwinian belief of “Survival of the Fittest” This explains that the best suited animal will thrive in that area while the least suited will die off Also called “Natural Selection”