|Human Hand Adaptation|
Introduction: life things have actually bodies that room adapted for the places they live and also the points they do. Fish have gills so that they deserve to remove oxygen the is dissolved in water. Many plants have green leaves i beg your pardon contain chlorophyll so that they have the right to make food. Jellyfish have actually stinging cells to catch prey. Birds have hollow spongy bones so the they will be light sufficient to fly. Arctic animals have layers of fat and also thick coats that fur come keep heat in the frigid Arctic climate. There are hundreds of instances of methods that organisms are adjusted for a effective lifestyle. Humans, too, are adapted for the points they do. One of our adaptations is our hand. Humans, as well as monkeys, gorillas, and also other primates, have a hand that have the right to grasp objects. We are able to understand objects because of our opposable thumb. Once students an initial hear or read about the opposable thumb throughout discussions of person evolution, they might perceive it together an anatomical fact with tiny seeming importance. In this activity, college student will uncover which the their simplest daily tasks are possible only due to the fact that of your opposable thumbs, which activities take much longer without the usage of one opposable thumb, and what kind of human tasks would not be most likely in the lack of one opposable thumb. In this laboratory exercise, you will do several usual actions. Climate you will readjust your hand so that it resembles the of a non-primate animal. Friend will recognize whether or not you can properly perform the same actions. This will demonstrate how the human being hand is adjusted for the actions that performs. You will work-related with a companion to do this exercise. Materials: (per group)masking tapescissorspaper clipszip-lock warehouse bagplastic fork and also knifesmall amounts of food item to it is in cutpenciljar v screw-on lidpaperroll of tapeballoonscombbooklace-up shoeclock with a 2nd handPiece of yarn or stringballoonclothes through zippers & buttons
Procedure: utilizing masking tape, have your companion tightly tape every of your thumbs to the palm the the hand. Then, shot to complete the jobs that are noted below. Be cautious not to usage your thumbs. Have your partner record on your data table just how long that takes to execute each task with your ignorance taped and also then with your thumb free.
You are watching: Adaptation of the human hand lab answers
If an activity takes longer than 2 minutes, record the event as not successful . After ~ completing each item, compose out the answers to the adhering to questions:
Tasks:Pick up a single piece the paper. Put it down on her desk.Pick up a pen or pencil from the table top. Usage it to write your name on the piece of paper.Open a book. Turn solitary pages in the book. Unscrew a bottle cap or jug cover.Use a fork and knife to cut a food item into tiny pieces.Tear off a little piece of tape.Turn ~ above the water faucet. (Complete activity #8!) revolve it off.Moisten a paper towel and wash and dry the desktop.Sharpen a pencil.Cut a circle the end of a piece of file using scissors.Pick up all the scraps from task #10 and throw them into the recycling box.Comb her hair. open a door.Pick increase one document clip. Clip a heap of files together.Tie her shoelaces.Button numerous buttons.Zip up your jacket.Blow increase a balloon and tie it. Tie a node in a item of string.Close a zip-lock bag.
|Task||Time Taken because that Event:||Task an obstacle With videotaped Thumb (More/Less)||Modification make to finish Task|
|Thumb Free||Thumb Taped|
|Pick up paper|
|Turn book pages|
|Use knife & fork|
|Tear turn off tape|
|Turn faucet on & off|
|Clean workdesk top|
|Sharpen a pencil|
|Cut out a circle|
|Pick increase the scraps that paper|
|Clip records together|
|Button & unbutton garment|
|Blow increase & tie balloon|
|Close zip-lock bag|
Conclusion: 1. Define why dog and also cat paws are not adapted for doing the six actions girlfriend tested. 2. What space cat and also dog paws adapted for? 3. Describe how her hand is adjusted for law the actions girlfriend tested.
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4. You have an opposable thumb. Explain what this means. 5. Why do you feel that person hand adaptations have helped to make human beings such a successful species on earth?