<p> Life Has a History Internet Lesson Name: ______Date: ______Per: ___ http://www.ucmp.berkeley.edu/education/explorations/tours/intro/Intro5to12/tour1nav.php</p><p>As you navigate through Life Has A History, keep your eyes open for answers to the following questions. </p><p>1. Find the information describing the 30 million species of living organisms. Of that 30 million, how many are NOT animals? [HINT: Subtract the total number of animal species currently known from 30 million.] </p><p>2. Find the three lens views comparing the oceans through time. Name one animal common to today's ocean whose relatives were also around 470 million years ago. </p><p>3. Find the timeline. How many millions of years did dinosaurs exist on Earth before they became extinct (you need to do some subtraction again)?</p><p>4. What is one of the best sources of evidence for the history of life on Earth?</p><p>5. Find and name at least five things other than bones that can be preserved as fossils. </p><p>6. Find a picture of Deinonychus and three of its relatives. What features do the birds all share that Deinonychus does not? </p><p>7. During this tour, you will learn about cladograms. When you reach that point, complete this sentence: </p><p>A cladogram is a diagram that shows... </p><p>8. On the cladogram below, the common ancestor of the crane and eagle is circled. Find and circle the common ancestor of the crane, eagle, Archaeopteryx, and Deinonychus.</p><p>Deinonychus Archaeopteryx crane eagle</p><p>9. Which animal on the cladogram are the crane and eagle most closely related to? How do we know this?</p><p>10. How can variations in a species lead to evolution?</p><p>11. Find the bar graph that shows the differences in beak size among three species of Galapagos finches. Name the species of finch that has a beak that can be longer than 15 mm.</p><p>12. Find the page showing three graphs side by side. The graph on the right shows an increase in the finch's body and bill size. Why did that happen? </p><p>13. Natural selection is not the only mechanism of evolution. What else can change the genetic make-up of a population?</p><p>14. What is a quagga and why can't you have one for a pet? </p><p>15. How did Lambeosaurus use its nasal passage? </p>