Today’ Agenda: Journal Question: a. What is an adaptation? *1. Lecture V: Natural Selection & Adaptations (slide 37) 2. Biome Presentations 3. Homework:

Slides:



Advertisements
Similar presentations
Mechanisms of Evolution Chpt 6-1 Is evolution a Theory? Why is it Controversial?
Advertisements

Evolution of Populations
Evolution & Natural Selection.
Evolution Chapter 16.
EVOLUTION: A History and a Process. Voyage of the Beagle  During his travels, Darwin made numerous observations and collected evidence that led him to.
Charles Darwin & Natural Selection
Darwin & Natural Selection
D2.4 Adaptations. Thousands of generations can be studied by looking at the fossil record of the species. – From this, Biologists can study the morphology.
How do organisms adapt and change over time? What makes this flounder fish so unusual? And, how did it get this way?
EVOLUTION: A History and a Process Chapter 14. Voyage of the Beagle  During his travels, Darwin made numerous observations and collected evidence that.
Biology 13.3 Examples of Evolution
Evolution. Evolution Change over time Theory that modern organisms descended from ancient organisms due to how they have changed over a long period of.
What contributions did Mendel make to
Mechanisms of Evolution. I. Natural Selection & Charles Darwin  Charles Darwin ( ) an English scientist considered the founder of the evolutionary.
Evolution The process of biological change by which descendants come to differ from their ancestors. Nowicki, 2008.
AND ADAPTATIONS NATURAL SELECTION 1. CHARLES DARWIN His theory of evolution by natural selection explained: Where all of the astonishingly diverse kinds.
Evolutionary Theory A Theory to Explain Change Over Time.
1 The Theory of Natural Selection Biology I. 2 I. Early Biology Scientists knew that organisms had changed Fossil evidence Age of the Earth.
Evolution Chapters 13, 14, & 15. Earth has millions of other kinds of organisms of every imaginable shape, size, and habitat. The variety of living things.
CHANGES IN ORGANISMS OVER TIME. STANDARD S7L5. Students will examine the evolution of living organisms through inherited characteristics that promote.
Adaptations.
Evolution By Aimee Chavez. Species  Species: group of organisms that share similar characteristics and can reproduce among themselves to produce fertile.
Chapter 15 and 16 Evolution - Change through time.
Darwin & Natural Selection Evolution Unit Notes. Learning Goals  1. Define "Evolution" & "Natural Selection".  2. Describe the 4 steps of Natural Selection,
Evolution and Darwin. Evolution processes earliest forms diversityThe processes that have transformed life on earth from it’s earliest forms to the vast.
Charles Darwin ( ) Sailed around the world
Your tables are your teams. Place each question under the correct learning target. Work together to get the most points. This is a fun way to study for.
Darwin and Evolution Evidence Adaptation Speciation.
EVOLUTION SBI3U/3C M. St Denis. Charles Darwin –  An English Biologist  Fascinated by different species and fossils.  Traveled around the.
  Two ways to describe evolution:  1. Change in features over time  2. The history of life on earth What does evolution mean?
copyright cmassengale
HAPPY TUESDAY Bellwork for yesterday write “video” Today you will need: Something to write with, a new Bellwork Sheet and your Journal Turn in your homework.
The image shows the changes of beak shape in the Galapagos finch to suit the different food sources available on different islands in the archipelago.
“Nothing in biology makes sense except in the light of evolution.” Biologist (1900 – 1975) _____. Darwin Charles Darwin in later yearsCharles Darwin at.
Evolution: Science Department Unit Review #1-46 Science Standards: 7a-d, 8a-e Updated 2011 VG Charles Darwin.
1 UNIT 5 PART 2: THE MODERN THEORY OF EVOLUTION The evidence shows that evolution occurred but not how or why. There have been different theories.
The Theory of Evolution.  Darwin developed the first theory on evolution, which is the basis for modern evolutionary theory ◦ Darwin spent 5 years sailing.
Evolution and Natural Selection. Population – group of organisms of the same species living together in a given region Natural Selection – process whereby.
Charles Darwin Put forward a theory in 1856 He knew nothing about: Genes Chromosomes Mutations.
Chapter 15. Evolution – any change over time Theory – testable explanation that is well supported 1831 – Charles Darwin’s voyage aboard the H.M.S. Beagle.
The Evolution of Living Things Chapter 7 Sec. 1 "nothing in biology can be understood except in light of evolution" evolutionary biologist Dobzhansky.
1 History of Evolutionary Thought. 2 Early Ideas On Earth’s Organisms Aristotle believed species were fixed creations arranged by their complexity Aristotle.
Theory of Evolution by Natural Selection
Darwin & Natural Selection
Darwin & Natural Selection
The Theory of Evolution
October 2017 Journal: What is a theory? Are theories always true?
Evolution Ie- Change over Time.
Warm-Up: Study for Earth’s History Test Date Session # Activity Page #
UNIT 5 PART 2: THE MODERN THEORY OF EVOLUTION
Theory of Evolution Evolution: The process of change over time
Evolution Ie- Change over Time.
Chapter 15 Theory of evolution.
Natural Selection.
Natural Selection Pre-AP Biology.
Theory of Evolution Evolution: The process of change over time
Darwin & Natural Selection
EVOLUTION QUESTIONS.
Evolution Ie- Change over Time.
Natural Selection Struggle for Existence Survival of the Fittest
5.2 Natural selection The diversity of life has evolved and continues to evolve by natural selection.
Natural Selection & Evolution
This is Evolution.
October 5, 2017 Journal: What is a theory? Are theories always true?
E V O L U T I O N.
Evolution, Darwin & Natural Selection
Notes: Theory of Evolution
Darwin & Natural Selection
Darwin vs. Lamarck.
Mechanisms of Evolution
Presentation transcript:

Today’ Agenda: Journal Question: a. What is an adaptation? *1. Lecture V: Natural Selection & Adaptations (slide 37) 2. Biome Presentations 3. Homework: Study Guide 8/18/20151

Lost….. 8/18/20152

Lost! 8/18/20153

Lost! 8/18/20154

Get Help Tutoring Available: -Study Center (lunch, 7 th period, after school) 8/18/20155

Feeling Lost…. 1. Get Help! 2. Tutoring Available in the Study Center: J109 8/18/20156

Feeling Lost… In Biology If you are getting a “D” or lower go to tutoring and receive ten points added to your grade. When: (1) Before School (2) Nutrition (3) Lunch (4) Period 7 & After School Where: J109 Needs: Tutoring Form 8/18/20157

8 Lecture V: Natural Selection & Adaptations By Dr. Rick Woodward

What you should know for Exam I (That is not on the study guide) A. Geographic Isolation B. Adaptive Radiation C. Gene mutation has adaptive value…. D. Today’s lecture on natural selection and adaptations 8/18/20159

Geographic Isolation A. Geography separates a species from reproducing. (1) Example: The Grand Canyon separating squirrel populations 8/18/201510

Adaptive Radiation A. Diversity of finch species found on the Galapagos Islands. (Adaptations) 8/18/201511

An Adaptation… A. Big Mamma …Blending in…. 8/18/201512

8/18/ Darwin’s Theory of Natural Selection (1) In nature there is a tendency toward overproduction. a. Examples: mice, watermelons, ants, fish, and mosquitoes are all well-known overproducers.

8/18/ Darwin’s Theory of Natural Selection (2) Not all offspring that are produced survive. a. Example: many bacteria that are treated with antibiotics will die.

8/18/201515

How antibiotics destroy bacteria: 8/18/201516

8/18/ Darwin’s Theory of Natural Selection (3) Variations exist in any population. (4) Variations are inherited.

8/18/ Darwin’s Theory of Natural Selection (5) Those individuals with variations that are suitable for their environment will live longer and leave more offspring on average.

8/18/ Natural selection Microevolution: change in allele frequency in a population

8/18/ In the Galapagos A. Based on Darwin’s observations in the Galapagos: 1. Darwin’s described evolution as descent with modification. -structural or functional changes occur from one group of descendants to the next, and so on.

8/18/ In the Galapagos 2. Darwin performed extensive research on the island’s finch population. a. Studied finches structural modification (bird’s beaks) to environment

8/18/ Natural Selection & Adaptations The leaf bug A. An adaptation is a characteristic that helps an organism survive in its environment or reproduce.

8/18/ The Evolution of Complex Adaptations A. Adaptations in organisms you see today are the result of chance variations that arose at a particular time in the evolutionary history of that type of organism. B. Example: The eye (next slide)

8/18/ A Series of Changes During the Evolution of the Eye A. Simple animals such as flatworms have groups of light-sensitive cells to detect light. B. More complex animals have visual systems that form images. C. In mollusks the images are blurry. D. The images are focused for a turtle. E. The images are focused and enhanced by color in the eagle and many other vertebrates.

8/18/ Explaining the Complexities of the Eye A. Biologist know that the eye began only as a group of light- sensitive cells. B. The ability to distinguish between light and dark was an advantage because it enabled organisms to avoid danger and exploit new food resources more efficiently than organisms without this adaptation.

8/18/ Explaining the Complexities of the Eye C. Later, over time, new variations arose that resulted in the formation of a simple lens providing a blurry image. D. Seeing even a blurred image is an advantage over seeing no image at all.

8/18/ Explaining the Complexities of the Eye E. Later changes led to a sharpening of focus, and, probably at the same time, still other changes permitted color vision. F. The structure becomes more adaptive and improves an animal’s chances of survival, and, therefore, the passing of its genes to offspring. (natural selection)

8/18/ Types of Adaptations A. Structural Adaptations 1. The most obvious adaptations are those involving structure or anatomy. 2. Traits such as the structure of a bird’s beak, the hoof of a horse, or the shape of a tooth are called structural adaptations. 3. Many obvious structural adaptations in animals are for obtaining food.

8/18/ Structural Adaptations A. The neck of the Giraffe B. The slow hypothetical evolution: Response to Acacia Trees C. Neck increased in length to reach food in trees.

8/18/201530

8/18/ Structural Adaptations that mimic the environment

8/18/ Structural Adaptations that Mimic the Environment

8/18/ Structural Adaptation in the Angler Fish A. Protruding from the top of the angler fish’s skull is a long filament that is broad and flat at its tip. B. It hangs in front of the fish’s mouth and attracts prey, much like a fishing lure. C. When the prey bites at the lure, the angler fish sucks the prey into its mouth.

8/18/ Deep Sea Hairy Angler Fish

8/18/ Physiological Adaptations A. The enzymes needed for digestion, clotting of blood, or muscular contractions in animals fall into the category of Physiological Adaptations. B. Such adaptations have a chemical basis. C. Other examples include the poison venom of a snake, the proteins used in a spider’s web, and the ink of an octopus.

8/18/ Behavioral Adaptations A. Organisms are also adapted in their responses to the environment. B. Birds migrate in search of food, squirrels hunt and store nuts, wolves track their prey, C. Such responses are examples of behavioral adaptations.

8/18/ In-Class Assignment for next class session 1. Create an organism with: (1) At least three structural adaptations. (2) At least two physiological adaptations. (3) At least two behavioral adaptations. 2. Draw this organism and explain how these adaptations benefit this being and allow it to compete and survive.