Darwins Theory of Evolution The Puzzle of Lifes

Darwin’s Theory of Evolution The Puzzle of Life’s Diversity Chapter 16 -1 Image from: Biology by Miller and Levine; Prentice Hall Publishing© 2006

http: //www. millan. net REMEMBER ! The total variety of all the organisms in the biosphere = ________ Where did all these different organisms come from? How are they related?

What scientific explanation can account for the diversity of life? ANSWER: A collection of _______, and ______ known as ____________

http: //harrier. users. netlink. co. uk/Darwin_sm. jpg The person who contributed the most to our understanding of evolution was ___________ In 1831, at age 22, he joined the crew of the ________ as a naturalist for a ____ voyage around the world. Image from: Biology by Miller and Levine; Prentice Hall Publishing© 2006

During his travels, Darwin wrote thousands of pages in his journals, drew pictures of the things he saw, and collected a vast amount of _______ that led him to propose a ____________ about the way _______. http: //www. elsie. brandeis. edu/images/journals. gif http: //www. 24 hourmuseum. org. uk/chg/content/images/2003_2233. JPG

DARWIN WONDERED? Why do Argentina and Australia have ______ even though they have ____ grassland ______? Why are there no ______ in Australia and no ____ in England? Why have so many species disappeared? How are these ______ species related to living species? http: //www. rc. umd. edu/praxis/mitchell/images/dinosaur 1. gif

Who Was Charles Darwin? While on his voyage around the world aboard the ______, Charles Darwin spent about one month observing life on the ________. There, he encountered some unique animals, such as ______ and ____. http: //www. darwinadventure. com/pictures/galapagos_giantortoise. jpg http: //mikebaird. com/ecuador/images/galapagos_off_ecuador_ng_map. jpg

The Galάpagos Islands are close together but have very different _______. Some were hot and dry, with little vegetation. Others had more rainfall and were rich in vegetation Biology by Miller and Levine; Prentice Hall Publishing© 2006 Each island had its own _________ of plant and animal species.

Giant Tortoises of the Galápagos Islands Section 15 -1 and on Pinta Island, tortoise necks were somewhere in between Pinta Island Tower Marchena Intermediate shell Fernandina James Santa Cruz Isabela Santa Fe Hood Island Floreana Isabela Island Hood Saddle-backed shell On the desert-like Hood Island, tortoises had long necks… Dome-shaped shell …while on the lush rainforest of Isabela Island, tortoises had short necks…

After his voyage, Darwin spent a great deal of time thinking about his findings. Biology by Miller and Levine; Prentice Hall Publishing© 2006 He began to wonder if animals living on different islands had once been members of the ______ that had developed _____ characteristics after becoming _______ from one another in different habitats.

Darwin’s Theory of Evolution Ideas that Shaped Darwin’s Thinking Chapter 16 -2 Image from: Biology by Miller and Levine; Prentice Hall Publishing© 2006

Ideas that shaped Darwin’s thinking: In 1785 _______ proposes that the EARTH was _______ by _________ occurring over _____ periods of time, and is ________ old. http: //www. creationism. org/books/Taylor. In. Minds. Men/Taylor. IMMc 03. htm

Ideas that shaped Darwin’s thinking: In 1833 ______ explains that the geological processes still ______ have shaped Earth’s features over ________ http: //www. biologydaily. com/biology/Sir_Charles_Lyell

DARWIN DIDN’T KNOW ABOUT PANGEA SINCE THEN Theory of Pangaea …and continental drift http: //wrgis. wr. usgs. gov/docs/usgsnps/animate/A 08. gif

http: //www. wasatchcomputers. net/gallery/elk_fight. jpg REMEMBER ! Chapter 3 _________ Living things must compete for food, shelter, space, mates

http: //www. nndb. com/people/250/000024178/malthus. jpg Ideas that shaped Darwin’s thinking: ___________ He observed that babies were being born faster than people were dying. He reasoned that if the human population continued to grow, sooner or later there would be ____________

http: //www. educa. rcanaria. es/fundoro/00. corsi. htm Ideas that shaped Darwin’s thinking: ______________ was one of first scientists to recognize living things ________ and that all species were ____ from other species. Lamarck published his hypothesis of ____________ the year Darwin was born.

The male fiddler crab uses its front claw to _____mates and fight off _______. Through _____ use, the front claw becomes ____. The fiddler passes on this _____ characteristic to its offspring

http: //www. geocities. com/arnold_schwarzenegger_pictures/ What’s WRONG with Lamarck’s hypothesis? Lamarck didn’t know about genes and how traits are _______. If you lifted weights your whole young adult life, and then you had children, would your kids be more muscular?

http: //cdn. sheknows. com/articles/2011/05/schwarzenegger-family. jpg NO! ____ traits can ____ be _____ to their offspring.

What’s RIGHT with Lamarck’s hypothesis? Lamarck was first to develop a scientific hypothesis about _______ and recognize that organisms are ____________ http: //pegasus. cc. ucf. edu/~he 599900/giraffeeating. jpg

Match the letter of the idea with the man or men who proposed it: Malthus Hutton Lyell a. b. c. d. Lamarck The earth is really old, and slowly changes Living things pass acquired changes on to their offspring Sooner or later growing populations run out of resources Living things change slowly over time because of competition for resources, and pass those changes on to their offspring