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
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…
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
Some mammals use their tongues because they lack teeth
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?
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
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”