Darwins Theory of Evolution The Puzzle of Lifes

Darwin’s Theory of Evolution The Puzzle of Life’s Diversity Chapter 15 -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?

The theory of _______ explains where all the diversity on the planet comes from. http: //www. millan. net

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 revolutionary _______ about the way life changes. 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 different animals even though they have similar grassland ecosystems? Why are there NO rabbits in Australia and NO kangaroos in England? Why have so many species disappeared? How are these extinct 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 H. M. S. Beagle, Charles Darwin spent about one month observing life on the ______ Islands. He saw some unique animals, such as finches and tortoises found no where else on the planet. 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 _____ 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 Go to on the lush rainforest of Isabela Island, Section: tortoises had short necks…

When Darwin returned from his voyage he spent many years studying the specimens he brought back and thinking about all the things he had seen. http: //www. alexandrablythe. co. uk/photogallery/archive 1 -pics/k. Darwin%27 s-desk. jpg

Darwin’s Theory of Evolution Ideas that Shaped Darwin’s Thinking Chapter 15 -2 Image from: Biology by Miller and Levine; Prentice Hall Publishing© 2006

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

Ideas that shaped Darwin’s thinking: 1833 ______ explains that the geological processes that shaped the Earth are still happening. http: //www. biologydaily. com/biology/Sir_Charles_Lyell

Ideas that shaped Darwin’s thinking: 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: 1798_________ Babies were being born faster than people were dieing. He reasoned that if the human population continued to grow, sooner or later there would NOT be enough ________for everyone

http: //www. educa. rcanaria. es/fundoro/00. corsi. htm Ideas that shaped Darwin’s thinking: 1809__________ First scientist to recognize living things change over time and that all species were descended from other species. Lamarck published his hypothesis called the INHERITANCE OF __________ the year Darwin was born.

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

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

http: //z. about. com/d/movies/1/0/A/f/8/bench 04020607. jpg ACQUIRED traits can ____ be _____ to offspring.

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