 Challenge  How Does Evolution Happen? Useful Vocabulary:  Adaptation  Natural Selection  Variation  Evolution ACTIVITY 94: A MEETING OF THE MINDS Read Intro on Page F-24

 Evolution  A change in a species over time  Adaptation  any trait that makes you better suited to your environment  Natural Selection  Organisms with traits better suited to their environment survive and reproduce more than those with less desirable traits do. DEFINITIONS:

Getting Started BREEDING DOGS… LISTEN TO THE FOLLOWING SCENARIO AND WRITE YOUR THOUGHTS IN YOUR JOURNAL! Inherited TraitAcquired Trait

1)Charles Darwin: 19 th Century Scientist 2)Isabel Matos: Science Reporter for Station W-EVO 3)Jean-Baptist Lamarck: 19 th Century Scientist 4)Wendy Chin: Middle School Student Complete the 7 Agree/Disagree while you read!* When you are done, answer analysis questions 1 and 2 with your group in your notebook! ROLE PLAYING

Analysis Question 1 1A) DRAW A VENN DIAGRAM 1B) WHY IS DARWIN’S THEORY MORE CONVINCING? LamarckDarwin

Analysis Question #2 AN ELEPHANT WITH A SHORT TRUNK COULD NOT REACH THE HIGHER LEAVES ON A TREE. SO ITS TRUNK STRETCHED AS IT TRIED TO REACH MORE LEAVES IN ORDER TO SURVIVE. WHEN THE ELEPHANT HAD BABIES, THE BABIES HAD SLIGHTLY LONGER TRUNKS BECAUSE OF THE STRETCHING. WHEN THEY GREW UP THEIR TRUNKS STRETCHED TO EVEN HIGHER LEAVES. THEIR CHILDREN HAD EVEN LONGER TRUNKS. THIS HAPPENED FOR MANY GENERATIONS, UNTIL THE ELEPHANT TRUNKS BECAME AS LONG AS THEY ARE TODAY.