Presentation on theme: "Darwin’s Theory of Evolution"— Presentation transcript:
1 Darwin’s Theory of Evolution Chapter 16Darwin’s Theory of Evolution
2 16.1 Darwins Voyage Targets State Charles Darwin’s contributions to science.Describe the three patterns of biodiversity16.1 Darwins Voyage
3 1. Young Charles Darwin 2. Born in 1809 in Shrewbury, England 2. Studied medicine and ministry in his twenties3. His true interest was nature2. Encouraged by his Cambridge professor to take a job as a naturalistCharles Darwin was born the same day as Abraham Lincoln!
4 1. Darwin’s Voyage2. After Graduating, Darwin took an invitation to be an unpaid naturalist on a 5 year expedition to South America. 3. The ship Darwin was aboard was called the H.M.S. Beagle 3. While on the ship Darwin collected and studied fossils.
5 1. The Galapagos Islands2. The Galapagos Islands are located about 600 miles west of South America 2. On the different Islands Dawin carefully collected different species specimen.
6 2. While traveling Darwin noticed THREE distinctive patterns of diversity 3. Species vary globally 3. Species vary locally 3. Species vary over time
12 2. After careful inspection of the finches Darwin developed a scientific theory of biological evolution. 3. Darwin’s Theory of Evolution explains how modern organisms change over long periods of time. 2. The process of changing over time is called Evolution.
14 1. Natural Selection 2. Tendency towards overproduction 2. Not all offspring survive2. Variations exist in any population2. Variations are inherited2. The best organism will live longer and produce more offspring2. Populations change as it becomes better adapted to it’s environment
15 1. Origin of Species2. After Darwin’s Theory of Evolution and Natural Selection he published his findings in a book called, The Origin of Species 3. The book was written in 1844, but was not published until 1859
16 Ostriches and Rheas are in the same super order Ostriches and Rheas are in the same super order. Ostriches, Rheas, and Emus are all in the same class.Not an Emu, Ostrich, or Rheas. This is a Road Runner
17 16. 2 Ideas that shaped Darwin’s thinking. Targets:Identify the conclusions drawn by Hutton & Lyell about Earth’s historyDescribe Lamarck’s hypothesis of evolutionDescribe Malthus’s view of population growth.Explain the role of inherited variation in artificial selection.
18 1. Hutton and Lyell2. In the 18oo’s most people (including scientists) thought the Earth was only a few thousand years old and hadn’t changed much. 2. Two Geologist, Hutton and Lyell were the first to form hypotheses about the Earth being extremely old and ever changing.
19 2. After witnessing an earthquake while in South America, Darwin concluded that Hutton and Lyell were correct. 3. Darwin asked himself, “ If Earth can change, could life change too?”
20 1. Lamarck2. Jean-Baptiste Lamarck was a French naturalist 2. He was the first to SAY species change
21 2. Lamarck thought that species changed in 2 ways: 3 2. Lamarck thought that species changed in 2 ways: 3. Organisms can change by selective use and disuse of body parts. (Don’t use it, you lose it) 3. Acquired traits could be passed on to offspring.
25 2. Evolution does not have a predetermined path, it is completely random.
26 1. Malthus2. Thomas Malthus was an English economist. 2. Malthus said that when birth rate in humans exceeds death rate, it will lead to over crowding. 3. This helped Darwin form the mechanism of evolution.
27 1. Artificial Selection2. selective breeding of plants or animals for a desired trait 3. ex: farmers select traits in crops and livestock 3. ex: Darwin breed pigeons at his own home
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